Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 circle track and drag racing

circle track and drag racing

contributing to the overall efficiency and performance of your engine

The 8-pinion rear planetary carrier is made from 4340 steel

even while the transmission is still installed in the vehicle

6 rib serpentine pulley designed to increase grip

Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 circle track and drag racingSpeedmaster 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