- Custom tooling was created to provide a countersink relief for the bolt/nut head versus machining away the entire end of the shaft per the factory design
- Recommended for all M-Eight engines and especially for engines running higher lift camshafts and heavier valve spring pressures
- Over double the strength of factory rocker shafts
- Gas nitrated and final surface treated
- Designed with strength in mind
- Made in the U.S.A.