Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 contributing to the overall efficiency

contributing to the overall efficiency and performance of your engine

even while the transmission is still installed in the vehicle

circle track and drag racing

The dress up kit pieces are machined from stainless steel and aluminum

acceleration is more responsive

Chevy GM LS 6.780" 10% Underdrive Harmonic Balancer Damper SFI 18.1 contributing to the overall efficiencySpeedmaster 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