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The Speedmaster C4 performance planetary gear sets eliminate your weakest link
improved meshing to reduce tooth jump
The OEM replacements get harder to find as time goes on
Made from cast aluminum and feature cast-in ribs for added strength and heat dissipation
Mounting hardware is included
Chevy SBC 350 1955-85 Rubber w/Steel Core Valve Cover Gasket Set - Black The Speedmaster C4 performance planetarySpeedmaster valve cover gaskets are manufactured from high quality rubber, which is molded over and vulcanized to a rigid steel frame. They won't leak, blow out, or get sucked in, the way stock or inferior quality aftermarket gaskets can. These gaskets feature superior quality rubber and steel, which outlast cork and rubber composite designs to provide years of dependable service, especially if you frequently have to remove and reinstall the valve
