7/16" Polylock Rocker Arm Nut Set (Suits: BBC 454 Stud Girdle) Our dual plane big block

Our dual plane big block manifold is now available with rectangular ports

On the outside we've added a heavy-duty

this pulley ensures optimal performance and efficiency for supercharged setups

This upgraded combination elevates the standard in electronic fuel injection

Built with sturdy

7/16" Polylock Rocker Arm Nut Set (Suits: BBC 454 Stud Girdle) Our dual plane big blockSpeedmaster 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