SFI 18.1 Harmonic Damper for LS1, LS2, LS3, LS6 Corvette, Pontiac G8 & Cadillac CTS-V w/Crank Bolt.

 Features 10-Rib drive & 15% Overdrive Pulley.

6 BOLT DOUBLE GM PATTERN  WILL FIT 3 BOLT OR 6 BOLT -  NOT SUPERCHARGER PATTERN  

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.

NOTE: Innovators West specific pin kit required when used with a stock non-keyed crankshaft.

• Diameter: 8.350″
• Weight: CALL
• 15% Overdrive
• 10-Rib
• Comes with Single 3/16″ Keyway
• Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.
• NOTE: The Super Duty Blower Hub option is a thicker hub that provides greater resistance to hub cracking under high power supercharged applications (750 rwhp and greater). This option includes a new custom made timing cover seal to adapt the oversized hub to a stock timing cover.