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Speedmaster main caps improve reliability in highly stressed engines by reducing distortion of the main bearing bores
Made from 5051 aircraft aluminum alloy
Speedmaster gilmer drive kits are aluminium machined and precision made for your street/race engines
plus upgraded material and a custom manufacturing process
Supercharger restraints are designed to keep supercharger parts intact incase of an explosion
Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 Speedmaster main caps improve reliabilitySpeedmaster Harmonic dampers feature a bonding process which adheres the elastomer to the i. d. of the inertia ring and the o. d. of the hub, utilizing a strong adhesive along with an improved elastomer to create a much stronger bond. The inertia ring rotates harmonically with the engine and absorbs the torsion vibration from the rotating assembly at any frequency and RPM. It extends the life of crankshaft and bearing which allows the engine to
