SFI 18.1 Harmonic Damper for LS1, LS2, LS3, LS6 Corvette, Pontiac G8 & Cadillac CTS-V w/Crank Bolt. Features 8-Rib drive & 15% Overdrive Pulley.
This damper comes standard with 3/16" Keyway for use with aftermarket crankshafts.
Note: 15% overdrive dampers will not fit with stock diameter water pump pulleys. Aftermarket pumps and/or custom smaller diameter pulleys made be needed for proper clearance to damper.