- Home
- AA Performance Products
- 501 Series Performance Heads 40 by 35.5 Valves, Pair
Description:
This is a brand new Set of 501 High Performance Cylinder Heads for a VW Type 1 2 or 3 Dual Port. Heads comes with Stainless Steel 40mm Intake and a Stainless Steel 35.5mm Exhaust Valves, with Harden Keepers, Chromoly retainers, and Single high rev springs. They are ready to install.
The 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 & 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.
Engine: VW Type 1 2 and 3 1600 Dual Port
Springs: Single or Dual High rev
Valves: 40mm Intake by 35.5mm Exhaust
Casting: AA Performance 501
Plug Size: 12mm (Replacement NGK Number is D8EA)
Head CC's: 55
Bore: 85.5, works with 85.5,87, and 88 slip in kits
Bore: 92, works with 88 thick wall, 90.5 and 92mm kits
Bore: 94, works with 92 thick walls K and M, and 94mm kits
Please Pick Bore size, and Spring Upgrade when ordering Above
Other fine products
Collections
- AA New T1/T2/T3 Long Block and Turnkey Engines
- AA Rebuilt T1/T2/T3 Long Block and Turnkey Engines
- AA Rebuilt Type 4 / 914 Engines
- AA Piston & Liner, Kits & Sets
- Brakes
- Camshaft Gears & Valve Train
- Carburetors & Kits
- Chassis Components
- Clutches & Kits
- Connecting Rods
- Crankshafts
- Cylinder Heads & Components
- Cylinder & Head, Shims & Gaskets
- Electrical Components
- Engine Accessories
- Engine Bearings
- Engine Cases
- Engine Rebuild Kits
- Engine Sheet Metal
- Exhaust Systems
- Exterior accessories
- Flywheels & Gland Nuts
- Fuel Injection
- Fuel Pumps & Accessories
- Gaskets & Push Rod Tubes & Seals
- Interior accessories
-
Off-Road
- Oil Pumps & Cooling
- Rebuilt Transmissions
- Ring Sets
- Starting, Charging, & Ignition
- Suspension & Steering Accessories
- Tools & Books
- Transmission Accessories
- Wheels
- Toyota 22R Parts
-
AA Performance Products Catalog
-
Apparel & Miscellaneous