Trailblazer SS 8 Rib Drive Conversion Kit with Std. Dia. Harmonic Damper

Trailblazer SS 8 Rib Drive
Conversion Kit with Std. Dia. Damper

Part# 998
Only $1080.00
8 Rib Drive Conversion Kit with Standard Diameter Damper for Trailblazer SS. Conversion Kits Include: Conversion kit includes:
18628-Rib Drive - Standard Diameter Damper
1970GM 8-Rib Alternator Pulley
1976Trailblazer 8-Rib P/S Pulley
19718-Rib LS Truck Large 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 Damper.


  • Dual Keyway Option - Add $20.00
    Add dual keyways for Supercharged or Extreme Duty Applications. Requires double keyed crankshaft snout.
  • 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.


  • Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.