GM BALANCERS & PULLEYS

A smooth running engine depends on an effective balancer or torsional damper. A GM Performance Parts damper not only helps your engine run smoothly, it can extend the life of the engine.

Pulleys
3899660
Crankshaft Pulley, 6" (not shown)
• Two groove
• Cast iron
• High rpm, power-saving crankshaft pulley

Balancer Bolts & Washers
9419218
Crankshaft Bolt (not shown)
• Positive retention 1/2-20 x 1-1/2" bolt
• For engines with tapped crank snout
• Use with washer P/N 3864814

3864814
Washer (Crankshaft Bolt) (not shown)
• 2.06" OD x 0.52" ID x 0.28" thick washer
• For crankshaft bolt

GM BIG-BLOCK BALANCERS

Part Engine Outside Technical Notes Number Application Diameter
3879623 Originally used on 1967–1969 427 8" Can be used on all engines with internally balanced crank. Use with timing pointer P/N 3991436.
10216339 454 and 502 with 4.00"-stroke crank 8" Counterweighted for externally balanced engines. Use chrome timing pointer P/N 3991436.
88962814 572 8" SFI-approved