LS2 GTO 8 Rib Drive Conversion Kit with 10% Overdrive Harmonic Balancer

LS2 GTO 8 Rib Drive (1st Design)
Conversion Kit with 10% Overdrive Balancer

Part# 1044
Only $1080.00

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

8 Rib Drive Conversion Kit with 10% Overdrive Balancer for GTO. Conversion kit includes:
18338-Rib Drive - 10% Overdrive Damper
1977LS2 GTO 8-Rib P/S Pulley - 1st Design
1970GM 8-Rib Alternator Pulley or 1089 Underdrive 8-Rib Alternator Pulley
11010GM Offset 8-Rib Smooth Idler Pulley
1973GM 8-Rib Ribbed Tensioner Pulley
Any additional aftermarket pulleys must be sourced from the manufacturer of those pulleys. Includes SFI 18.1 Harmonic Balancer.


  • Dual Keyway Option - Add $20.00
    Add dual keyways for Supercharged or Extreme Duty Applications. Requires double keyed crankshaft snout.
  • LS1 - LS2 - GTO Crank Pin Kit - Add $75.00
    #967 Crankshaft Pin Kit for GM LS1, LS2 GTO. Designed for use with Innovators West dampers. For Stock Crankshafts Only.
  • 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.

Application Notes



  • 10% Overdrive Balancer Pulley
  • Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.
  • LS GTO 17mm x 1.5 Alternator Nut for converting OEM Sprag style to fixed pulley.