7/16" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers) By using an aggressive lobe

By using an aggressive lobe profile

this intake manifold is built to withstand the demands of supercharged or turbocharged setups

Valve CoversCover your valvetrain with a set of Speedmaster fabricated aluminum valve covers

This crank support system is a must have for all small block chevy racers with a supercharger

7/16" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers) By using an aggressive lobeSpeedmaster rocker arm adjusting nuts are high quality polylocks designed for full roller rocker arms. Made from heat treated, premium grade 4140 chromoly steel, these adjusters provide 190,000 psi tensile strength for the utmost in reliability. Precision CNC machined threads to ensure optimum seat pressure, flush machined set screws for proper contact on the studs, and, best of all, they don't require any special tools for installation. They're