502 Series Performance Head W/ seats and guides 42 Intake 37.5 Exhaust black Fits 1200-1600cc engines with most

Fits 1200-1600cc engines with most single or dual carburetors

Tips are 32mm in diameter

Part #008 911 90S JE

5 Float Check Valve

Torque (Part#: H-4351VW-B): 28 lb-ft (5/16" Bolts)

502 Series Performance Head W/ seats and guides 42 Intake 37.5 Exhaust black Fits 1200-1600cc engines with mostMade 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. The 502 Series comes with our Stage 2 porting 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