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.
Dual Keyway Option - Add $20.00
Add dual keyways for Supercharged or Extreme Duty Applications. Requires double keyed crankshaft snout.
LSX Blower Hub Option - Add $25.00
The super duty hub has increased material for supercharged applications.This increased material helps to protect the hub from cracking in high load applications. The super duty hub is recommended for supercharged applications making over 750 rwhp. Includes matching timing cover oil seal.