Description:

Stock Head With seats and guides 35.5mm Intake 32mm Exhaust, with a 14mm long reach plug  

Made from an AA 500 Series Casting it comes STD with: Clean flowing cooling vanes, for maximum cooling through the head, and around the intake ports for increased HP and over all cooling. 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

Casting: AA 500 

Valve Size: 35.5x32

Head Bore: 85.5

Plug Size: 14mm (Replacement Bosch Number is W8CC or NGK is B5ES.)