Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 562" (40mm) axle shaft

562" (40mm) axle shaft

These high-quality mirrors feature glare-reducing glass

Speedmaster bearings are engineered with precision to provide superior quality

Provides very positive shifts for high performance street use or for competitive events

They feature aluminum construction and provide double rate cooling due to the double pass design

Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 562" (40mm) axle shaftSpeedmaster 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