502 Series Performance Heads 42 by 37.5 Valves, Pair

This is a brand new Set of 502 High Performance Cylinder Heads for a VW Type 1 2 or 3 Dual Port. Heads comes with Stainless Steel 42mm Intake and a Stainless Steel 37.5mm Exhaust Valves, with Harden Keepers, Chromoly retainers, and Dual high rev springs. They are ready to install. The 502 Series comes ported for you with a modernized combustion chamber for increased head flow & 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. Engine: VW Type 1 2 and 3 1600 Dual Port Springs: Dual High rev Valves: 42mm Intake by 37.5mm Exhaust Casting: AA Performance 502 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 92m