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These Speedmaster aluminum pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs
They provide higher power and torque transmission
Speedmaster offers all the accessories you will need to find the proper configuration for your supercharger combination
Speedmaster stud girdles will tie your studs together
The successful formula of offering a complete engine drive accessory kit has now been applied to the Serpentine with Speedmaster pulley systems
3/8" Polylock Rocker Arm Nut Set (Suits: Stainless Rockers) These Speedmaster aluminum pulleys areSpeedmaster 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
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