7/16" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers) The Speedmaster shift selector shaft

The Speedmaster shift selector shaft uses an O-ring to prevent leakage from GM TH400 cases

Speedmaster pulley systems work with any type of cylinder head or manifold configuration

these spacers can handle anything your vehicle can dish out

Will work with any Speedmaster or Speedmaster bellhousing

a C5 Corvette hub bearing pack

7/16" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers) The Speedmaster shift selector shaftSpeedmaster 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