7/16" Polylock Rocker Arm Nut Set (Suits: BBC 454 Stud Girdle) Ideal for high-performance street and

Ideal for high-performance street and race setups

Will work with any Speedmaster or Speedmaster bellhousing

Must be installed by experienced professional

enhancing overall performance and efficiency

Speedmaster Twin-Carb combine two four-barrel carburetors to achieve the best balance of drivability

7/16" Polylock Rocker Arm Nut Set (Suits: BBC 454 Stud Girdle) Ideal for high-performance street andSpeedmaster 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