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Speedmaster pulley systems work with any type of cylinder head or manifold configuration
6 rib serpentine pulley designed to increase grip
circle track and drag racing
If you're pushing your brake to the floor
The 8-pinion rear planetary carrier is made from 4340 steel
Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 Speedmaster pulley systems work withSpeedmaster 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
