7/16" Polylock Rocker Arm Nut Set (Suits: BBC 454 Stud Girdle) and forged flat-top pistons matched

and forged flat-top pistons matched to your bore size

This upgraded combination elevates the standard in electronic fuel injection

They are built from strong

Designed for precision fitment and easy installation

These computer-machined brackets are manufactured from high quality materials and come with a chrome finish

7/16" Polylock Rocker Arm Nut Set (Suits: BBC 454 Stud Girdle) and forged flat-top pistons matchedSpeedmaster 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