Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 but they retain the stock

but they retain the stock look

Speedmaster reflex headlights feature a diamond-style lens that diffuses light in a prismatic beam

These replacement valve seats are just like the originals

and replacement filters are available

unlike plastic alternatives

Chevy GM LS 5.670" 25% Underdrive Harmonic Balancer Damper SFI 18.1 but they retain the stockSpeedmaster 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