3/8" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers) Speedmaster high-volume water pumps have

Speedmaster high-volume water pumps have a ribbed aluminum housing and a heavy-duty ball/roller bearing assembly

These heavy-duty bearing retainer plates are precision-engineered and manufactured out of heavier steel than stock to ensure that they do their job

Choose long or short styles in a natural or shiny polished finishes

allowing it to run cooler and quieter than external units

equal-distribution layout produces great midrange torque without compromising top-end power

3/8" Polylock Rocker Arm Nut Set (Suits: Aluminum Rockers) Speedmaster high-volume water pumps haveSpeedmaster 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