Engine Timing Gear Drive 
Hi-Performance Model

Machined for Noise & Chain Stretch Reduction
For Big Block Chevy; Fits Under Stock Timing Cover
Features:
  • High-Performance Under Cover Model
  • for BB Chevy Engines
  • Dual Idler Type
  • Fits Stock Covers
  • Machined for Noise
  • Includes Locking Plate, Offset Cam Bushings, Roller Cam Bearing and Bronze Thrust Bearing
  • PROFORM Parts Brand Product
PART# 66918C
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For Chevrolet applications. These rugged gear drives offer high-precision timing, eliminating chain stretch. Machined for noise. Easy to install, fits under stock timing covers. Includes locking plate, offset cam bushings, roller cam bearing, and bronze thrust bearing.

  • For Chevrolet applications.
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