{"title":"Bare Casting","description":"","products":[{"product_id":"stock-head-bare","title":"500 Series Type 1 Head \"Bare\/Bare\"","description":"\u003cp\u003e\u003cstrong\u003eAA 500 Series Bare Casting, It is set up to build the performance Head of your needs. It Comes bare with a 12mm plug hole, and with out Seats orGuides.Giving you the the ability to build any possiblecombo Street head you want. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eThe 500 Series Castings come STD with: Cleanflowingcooling vanes, formaximumcooling through the head, and around the intake ports forincreasedHP and over all cooling. Amodernized Combustionchamber, for increased head flow \u0026amp; performance. AsecondFull Fin, soyou\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ecanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach \u003c\/span\u003e\u003c\/span\u003e\u003cstrong style=\"line-height: 1.2; font-size: 14px;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e3\/4 Inch \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eSparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug.\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eCasting: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eAA 500\u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eValve Size: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eN\/A\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eHead Bore: \u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e85.5\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ePlug Size:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":832914023,"sku":"031 CH 500","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-CH-500-1.jpg?v=1756336435"},{"product_id":"stock-head-w-seats-and-guides-35-5mm-intake-32mm-exhaust","title":"Dual Port Head with seats and guides 35.5mm Intake 32mm Exhaust","description":"\u003cp\u003e\u003cstrong\u003eStock Head\u003c\/strong\u003e\u003cstrong style=\"line-height: 1.2; font-size: 14px;\"\u003eWith seatsand guides 35.5mm Intake 32mm Exhaust, with a 14mm long reach plug \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong style=\"line-height: 1.2; font-size: 14px;\"\u003e\u003cstrong\u003eMade from an AA 500 Series Casting itcomes STD with: Cleanflowingcooling vanes, formaximumcooling through the head, and around the intake ports forincreasedHP and over all cooling. Amodernized Combustionchamber, for increased head flow \u0026amp; performance. AsecondFull Fin, soyou\u003cstrong\u003ecanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach 3\/4 Inch SparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 500\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e35.5x32\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e54\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size: \u003c\/strong\u003e14mm (Replacement Bosch Number is W8CCor NGKis B5ES.)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":832929323,"sku":"043 101 355CAA","price":199.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-500-420-Front_c0ed9fb5-d412-4d98-b0a4-3acd031d79c1.jpg?v=1756336434"},{"product_id":"stock-head-w-seats-and-guides-40mm-intake-35-5mm-exhaust","title":"Stock Head W\/ seats and guides 40mm Intake 35.5mm Exhaust","description":"\u003cp\u003e\u003cstrong\u003eAA 500 Series Casting\u003c\/strong\u003e\u003cstrong style=\"line-height: 1.2; font-size: 14px;\"\u003eWith seatsand guides40mm Intake 35.5mm Exhaust\u003c\/strong\u003e\u003cstrong\u003e, It is set up to build the performance Head of your needs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 500Series Castings come STD with: Cleanflowingcooling vanes, formaximumcooling through the head, and around the intake ports forincreasedHP and over all cooling. Amodernized Combustionchamber, for increased head flow \u0026amp; performance. AsecondFull Fin, soyou\u003c\/strong\u003e\u003cstrong\u003ecanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach \u003cstrong\u003e3\/4 Inch \u003c\/strong\u003eSparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 500\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003eN\/A\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":832931487,"sku":"031 500 420","price":219.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/043-101-355caa-2_83d4a33f-8d89-44cc-a8f5-9d0f5ba969e2.jpg?v=1756336432"},{"product_id":"performance-head-bare-no-seats","title":"501 Series Performance Type 1 Head Bare No seats","description":"\u003cp\u003e\u003cstrong\u003eAA 501 Series Casting, It is set up to build the performance Head of your needs. It Comes bare with a 12mm plug hole, and with out Seats or Guides. Giving you the the ability to build any possible combo Street\/Drag head you want. Seat Pockets start with the Stock 35.5x32 valve size Configuration and can be machined up to the 44x37.5mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eThe 501 Series Castings come STD with: Increasedmaterialat the intakesurfacegivingyou theabilityto make much bigger ports. Amodernized Combustionchamber, for increased head flow \u0026amp; performance. AsecondFull Fin, soyou\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ecanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e3\/4 Inch \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eSparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug.\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eCasting: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eAA 501\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eValve Size: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eN\/A\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eHead Bore: \u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e85.5\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ePlug Size:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":837014303,"sku":"031 CH 501","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-CH-501-Front.jpg?v=1756336426"},{"product_id":"performance-head-w-seats-and-guides-42-intake-37-5-exhaust","title":"501 Series Performance Head W\/ seats and guides 42 Intake 37.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 501 Series Casting, It is set up to build the performance Head of your needs. It Comes with Seats 42x37.5, Guides,with a 12mm plug hole.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eThe 501 Series Castings come STD with: Increasedmaterialat the intakesurfacegivingyou theabilityto make much bigger ports. Amodernized Combustionchamber, for increased head flow \u0026amp; performance. AsecondFull Fin, soyou\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ecanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e3\/4 Inch \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eSparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug.\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eCasting: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eAA 501\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e42x37.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eHead Bore: \u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e85.5\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ePlug Size:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":837337027,"sku":"031 501 440","price":314.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-CH-501-Front_58aa844e-fe39-4f1e-9d55-90fbb6abc078.jpg?v=1756336425"},{"product_id":"performance-head-w-seats-and-guides-44-intake-37-5-exhaust","title":"501 Series Performance Head  W\/ seats and guides 44 Intake 37.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 501 Series Casting, It is set up to build the performance Head of your needs. It Comes with Seats 44x37.5, Guides,with a 12mm plug hole.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 501 Series Castings come STD with: Increasedmaterialat the intakesurfacegivingyou theabilityto make much bigger ports. Amodernized Combustionchamber, for increased head flow \u0026amp; performance. AsecondFull Fin, soyou\u003c\/strong\u003e\u003cstrong\u003ecanFlycutyourheads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stoppossibleoil leaks. Long reach \u003cstrong\u003e3\/4 Inch \u003c\/strong\u003eSparkPlugs, toreduce the chance of cracking betweenthe Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 501\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e44x37.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eHead Bore: \u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e85.5\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003ePlug Size:\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":837338355,"sku":"031 501 460","price":314.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-CH-501-Front_8e514974-e1fb-432a-b460-ad3e07eb5f02.jpg?v=1756336423"},{"product_id":"amc-bare-1-8-casting-type-4-aircooled-round-port","title":"AMC Bare 1.8 Casting Type 4 Aircooled \"Round\" Port","description":"\u003cp\u003e\u003cstrong\u003eAMC Bare 1.8 Casting Type 4 Aircooled \"Round\" Port, build the performance Head of your needs. It Comes bare with out Seats or Guides. Giving you the the ability to build any possible combo Stock or Street head you want. \u003c\/strong\u003e\u003cb\u003eThe 1.8L casting come With a breather pipe, Slightly larger combustion chamber over the 2.0L castings, and still set up with smog holes.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExhaust Port: \u003c\/b\u003eRound\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"AMC","offers":[{"title":"Default Title","offer_id":849060219,"sku":"004 CH 022B-AMC","price":701.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/004-CH-022B.jpg?v=1756336407"},{"product_id":"amc-bare-2-0-casting-type-4-aircooled-square-port","title":"AMC Bare 2.0 Casting Type 4 Aircooled \"Square\" Port","description":"\u003cp\u003e\u003cstrong\u003eAMC Bare 2.0 Casting Type 4 Aircooled \"Square\" Port, build the performance Head of your needs. It Comes bare with out Seats orGuides.Giving you the the ability to build any possiblecombo Stock or Street head you want.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe 2.0L casting come With out a breather pipe, Slightly smallercombustionchamber over the 1.8L castings, and iswith out smog holes.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExhaust Port: \u003c\/b\u003eSquare\u003c\/p\u003e","brand":"AMC","offers":[{"title":"Default Title","offer_id":849575119,"sku":"004 CH 071B-AMC","price":669.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/004-CH-071B-1.jpg?v=1756336403"},{"product_id":"amc-bare-2-0-casting-type-4-aircooled-round-port","title":"AMC Bare 2.0 Casting Type 4 Aircooled \"Round\" Port","description":"\u003cp\u003e\u003cstrong\u003eAMC\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003eBare 2.0 Head Casting, Type 4 Aircooled \"Round\" Port. Sold ea.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuild the performance Head of your needs. It comes bare without Seats orGuides; giving you the ability to build any combo Stock or Street head you want.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 2.0L casting comes without a breather pipe. It has slightly smallercombustionchamber over the 1.8L castings, and comeswithout smog holes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust Port:\u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003eRound\u003c\/p\u003e","brand":"AMC","offers":[{"title":"Default Title","offer_id":849579867,"sku":"004 CH 061B-AMC","price":625.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/004-CH-071B-1_e7bb38bf-6118-4c45-94bf-2d4ac53fa266.jpg?v=1756336401"},{"product_id":"stock-head-single-port-w-seats-and-guides","title":"Stock Head Single Port w\/ Seats and Guides","description":"\u003cp\u003e\u003cstrong\u003eStock Replacement Single Port Head w\/ Seats and Guides\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis single-port casting is an excellent copy of the factory head. It comes with a STD Combustion chamber, and it also takes stock replacement plugs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA single port\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size:\u003c\/strong\u003e35x32\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5mm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead cc's: \u003c\/strong\u003e52-54\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e \u003cspan data-mce-fragment=\"1\"\u003eNGK Spark Plug 14mm 3\/4 Reach\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":942130015,"sku":"311 101 353A","price":229.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/311-101-353A-bare.jpg?v=1756336307"},{"product_id":"aa-bare-2-0l-porsche-914-casting-3-stud-round-port","title":"AA Bare 2.0L Porsche 914 Head Casting, 3 stud \"Round\" Port","description":"\u003cp\u003e\u003cstrong\u003eBrand New AABare 2.0Porsche914\/912E Head Casting. Sold each.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuild the performance Head of your needs. It comes bare without Seats orGuides.Giving you the the ability to build any possiblecombo Stock or Street head you want. The AA 2.0Lcasting comes with the STD Porsche2.0Lcombustionchamber. The STDPorsche2.0L Spark Plug angle. Also equippedwith a breather pipe and all the studs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe head temp sensor boss is there but not tapped.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePlease Note: The ExhaustGuide Hole is the same as the Intake 12mm. We did this to give you theability of running differentValve and Guide Combos. As it sits, it will take the 12mm intake guides when running8mm stainless steel valves. Or, the Guide Hole can be bored to acceptthe 13mm Type 4 guides or 15mm Porsche Guides when running the stock sodium filled valves.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eExhaust Port:\u003c\/b\u003e Round\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":36894461699,"sku":"004 CH 039BC","price":419.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/004CH039BC_1.jpg?v=1756335749"},{"product_id":"aa-bare-2-0-casting-type-4-aircooled-round-port","title":"AA Bare 2.0 Head Casting, Type 4 Aircooled \"Round\" Port","description":"\u003cp\u003e\u003cstrong\u003eBrand New AA Bare 2.0 Type 4 Aircooled \"Round\" Port Head Casting. Sold each.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuild the performance Head of your needs. It comes bare without Seats orGuides. Giving you the ability to build any combo Stock or Street head you desire.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 2.0L casting comes without a breather pipe. It has slightly smallercombustionchamber over the 1.8L castings, and comeswithout smog holes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust Port:\u003c\/strong\u003e Round\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":32346990837839,"sku":"004 CH 061BC","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/004CH061BC_1.jpg?v=1756334493"},{"product_id":"aa-bare-2-0-casting-type-4-aircooled-square-port-head","title":"AA Bare 2.0 Head Casting, Type 4 Aircooled \"Square\" Port","description":"\u003cp\u003e\u003cstrong\u003eBrand new AABare 2.0 Type 4 Aircooled \"Square\" Port Head Casting. Sold each.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuild the performance Head of your needs. It comes bare without Seats orGuides.Giving you the ability to build any combo Stock or Street head you desire.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 2.0L casting comes without a breather pipe. It is slightly smallercombustionchamber over the 1.8L castings, and comes without smog holes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust Port:\u003c\/strong\u003e Square\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":32347095203919,"sku":"004 CH 071BC","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/004CH071BC_1.jpg?v=1756334491"},{"product_id":"porsche-912-stock-head-bare-w-seats-and-guides","title":"Porsche 912 Stock Head, Bare W\/ Seats and Guides","description":"\u003cp\u003e\u003cstrong\u003eBrand New Porsche 912 Stock Head. It comes with 38mm intake and 34mm exhaust valves, seats, and guides. Sold each.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis casting is set up as an exact copy of the stock head with 14 mm x 1\/2 inch plugs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC's:\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e60\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease see AA Valve Guide Seals for Assembly (P\/N: \u003ca href=\"https:\/\/aapistons.com\/products\/porsche-356-912-valve-guide-seal\"\u003e616 105 491 02\u003c\/a\u003e)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":37959486701757,"sku":"616 104 301 03","price":503.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/61610430103_1.jpg?v=1756333863"},{"product_id":"porsche-912-stock-head-bare-w-o-seats-and-guides","title":"Porsche 356C-912 Stock Head, Bare W\/O Seats and Guides","description":"\u003cp\u003e\u003cstrong\u003eBrand New Porsche 356C-912 Stock Head. AA perofrmance made an exact copy of the factory 356C-912 Porsche head. It comes bare without seats and guides. Sold each.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis casting is set up as the stock head with 14mm 1\/2 inch plugs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC's:\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e60\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":37959566655677,"sku":"008 CH 912","price":449.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/008CH912_1.jpg?v=1756333861"},{"product_id":"501-series-performance-head-w-seats-and-guides-40-intake-35-5-exhaust","title":"501 Series Performance Head W\/ seats and guides 40 Intake 35.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 501 Series Casting, It is set up to build the performance Head of your needs. It comes with Seats 40x35.5, Guides, with a 12mm plug hole.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 501 Series Castings come STD with: Increased material at the intake surface giving you the ability to make much bigger ports. A modernized Combustion chamber, for increased head flow \u0026amp; performance. A second Full Fin, so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stop possible oil leaks. Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 501\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e40x35.5\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (Replacement NGK Number is D8EA)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC's: \u003c\/strong\u003e\u003cspan\u003e55\u003c\/span\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":42095714238712,"sku":"031 501 420","price":314.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-CH-501-Front_796219f9-5011-42c8-b7d9-8560a4a5735b.jpg?v=1756333480"},{"product_id":"502-series-performance-type-1-head-bare-no-seats","title":"502 Series Performance Type 1 Head Bare No seats","description":"\u003cp\u003e\u003cstrong\u003eAA 502 Series Casting, It is set up to build the performance Head of your needs. It Comes bare with a 12mm plug hole, and with out Seats or Guides. Giving you the the ability to build any possible combo Street\/Drag head you want.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eThe 502 Series comes with our Stage 2 porting with a modernized combustion chamber for increased head flow \u0026amp; performance. There is a second Full Fin, so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stop possible oil leaks. Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eCasting: \u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eAA 502\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003eN\/A\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003eHead Bore: \u003c\/span\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e\u003cspan dir=\"auto\" style=\"vertical-align: inherit;\"\u003e85.5\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":45804801786104,"sku":"031 CH 502","price":257.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/files\/031CH502.jpg?v=1756333176"},{"product_id":"502-series-performance-head-w-seats-and-guides-40-intake-35-5-exhaust","title":"502 Series Performance Head W\/ seats and guides 40 Intake 35.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 502 Series Casting, It is set up to build the performance Head of your needs. It comes with Seats 40x35.5, Guides, with a 12mm plug hole.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 502 Series comes with our Stage 2 porting with a modernized combustion chamber for increased head flow \u0026amp; performance. There is a second Full Fin, so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stop possible oil leaks. Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 502\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e40x35.5\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (Replacement NGK Number is D8EA)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC's:\u003c\/strong\u003e\u003cspan\u003e55\u003c\/span\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":45804859621624,"sku":"031 502 420","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/files\/031CH502_39a77783-a8cc-44c5-86f2-f508e168d45a.jpg?v=1756333175"},{"product_id":"502-series-performance-head-w-seats-and-guides-42-intake-37-5-exhaust","title":"502 Series Performance Head W\/ seats and guides 42 Intake 37.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 502 Series Casting, It is set up to build the performance Head of your needs. It Comes with Seats 42x37.5, Guides, with a 12mm plug hole.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 502 Series comes with our Stage 2 porting with a modernized combustion chamber for increased head flow \u0026amp; performance. There is a second Full Fin, so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stop possible oil leaks. Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 502\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e42x37.5\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":45804868665592,"sku":"031 502 440","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/files\/031CH502_a738c969-b2d8-4a62-baf4-f6168d2806cf.jpg?v=1756333174"},{"product_id":"502-series-performance-head-w-seats-and-guides-44-intake-37-5-exhaust","title":"502 Series Performance Head  W\/ seats and guides 44 Intake 37.5 Exhaust","description":"\u003cp\u003e\u003cstrong\u003eMade from an AA 502 Series Casting, It is set up to build the performance Head of your needs. It Comes with Seats 44x37.5, Guides, with a 12mm plug hole.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 502 Series comes with our Stage 2 porting with a modernized combustion chamber for increased head flow \u0026amp; performance. There is a second Full Fin, so you can Fly cut your heads deeper to achieve almost any desired Head CC volume needed. Blocked off rocker stud bosses, to eliminate the O-ring and stop possible oil leaks. Long reach 3\/4 Inch Spark Plugs, to reduce the chance of cracking between the Valve seat and Plug.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCasting: \u003c\/strong\u003eAA 502\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Size: \u003c\/strong\u003e44x37.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHead CC: \u003c\/strong\u003e55cc\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size:\u003c\/strong\u003e 12mm (ReplacementNGK Number is D8EA)\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":45804902121720,"sku":"031 502 460","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/files\/031CH502_883fc0c4-0e59-44f4-989a-b5a0d9100f18.jpg?v=1756333172"},{"product_id":"stock-autolinea-head-w-seats-and-guides-35-5mm-intake-32mm-exhaust-each","title":"Stock Autolinea Head W\/ seats and guides 35.5mm Intake 32mm Exhaust EACH","description":"\u003cp\u003e\u003cstrong\u003eAutolinea heads are made in Brazil and are available bare with quality components. Heads include standard 35.5mm intake and 32mm exhaust valve seats and guides. SOLD AS EACH\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eValve Seat Size:\u003c\/strong\u003e35.5x32\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHead Bore: \u003c\/b\u003e85.5\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlug Size: \u003c\/strong\u003e14mm 1\/2\" (Replacement Bosch Number is W8CC or NGK is B5ES.)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSOLD AS EACH\u003c\/strong\u003e\u003c\/p\u003e","brand":"AA Performance Products","offers":[{"title":"Default Title","offer_id":46087270301944,"sku":"043 101 355C-AL","price":259.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0574\/5353\/products\/031-500-420-Front_c0ed9fb5-d412-4d98-b0a4-3acd031d79c1.jpg?v=1756336434"}],"url":"https:\/\/aapistons.com\/collections\/bare-casting\/aa-performance.oembed","provider":"AA Performance Products Inc.","version":"1.0","type":"link"}