LSX 6-Rib Harmonic Damper for F-Body & GTO – 10% Underdrive #831


SFI 18.1 Harmonic Damper for GM 98-02 LS1 F-Body & 04-06 LS1/LS2 GTO – w/ Crank Bolt. Features 6 Rib drive & 10% underdrive diameter pulley.

Underdrive dampers are for use on Naturally Aspirated engines making 700hp or less. For engines making over 700hp, please use a standard diameter damper for greater dampening capability.

This damper comes standard with 3/16″ Keyway for use with aftermarket crankshafts..

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

  • Diameter: 6.5″
  • Weight: 7.8 lbs
  • 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.

5 in stock


Crankshaft Pin Kit for LS1, LS2 GTO F-Body #967

Crankshaft Pin Kit for LS1/2 GTO & LS1 F-Body.

Designed for use with Innovators West dampers. Will not work with OEM or other aftermarket dampers.

Double 3/16" Keyway Add On

Add an additional 3/16 Keyway to your Damper. Required the crankshaft to be machined for a second keyway 180* out from the original keyway. *Requires damper purchase. This is a labor option for new damper purchase only.

SKU: 831 Category: Tags: , , ,