Edelbrock Accu-Drive Camshaft Gear Drive Big Block Chevrolet

Features and Benefits:
- Replaces stock timing chain with compound gear drive train system
- Transfers crankshaft gear power to floating main idler to drive camshaft gear
- Offers accurate timing control without a chain to stretch
- Provides multiple cam timing adjustments for optimum performance
- Smooth cam rotation for precise valve timing
- Main idler gear floats between crank/camshaft gears for equal load sharing
- Billet SAE-1144 steel gears with induction-hardened teeth
- Gear teeth are shaved for precise operation
- Hardened/ground billet steel idler pins work with all standard camshafts
- Includes thrust bearing and keyway notch
- Mounts using (x3) 0.399" mounting holes
- 48-tooth sprocket-type gear, 0.1534" wide, 4.954" O.D., 0.751" I.D., 0.0585" thick
- Made in the USA

This Edelbrock Accu-Drive Camshaft Gear Drive replaces the standard timing chain with a compound gear drive train system that optimizes performance using multiple cam timing adjustments. The power generated by the crankshaft gear is transferred to a floating main idler, which then drives the camshaft gear with smooth and precise rotations for accurate valve timing. The main idler gear floats between the crank and camshaft gears to ensure equal load sharing, and the billet SAE-1144 steel gears with induction-hardened teeth are shaved for even more precision. Included with this Accu-Drive Camshaft Gear Drive (7891) are a thrust bearing and keyway notch. It mounts using three (x3) 0.399" mounting holes.