502 Series Performance Head W/ seats and guides 44 Intake 37.5 Exhaust opt-perf-crank-upg Sold as a pair or

Sold as a pair or as each

This Big Bore kit is the easiest way toturn your 2

Choose the size of carburetor that best fits your application

Crown Flat Top

Set at 120 psi

502 Series Performance Head W/ seats and guides 44 Intake 37.5 Exhaust opt-perf-crank-upg Sold as a pair orMade 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. 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