PRO/RACE Pro Racer Harmonic Balancer - 6.61" OD - SFI 18.1 - Iron - Internal Balance - Pontiac V8 H778C31XL Polycarbanate spoiler blades (shown) are

Polycarbanate spoiler blades (shown) are NOT included

Our tests show that with these improvements wider plug gaps can be used resulting in an increasing flame kernel growth for more efficient combustion

Flows 110 GPH (free flow)

1968-1972 Chevrolet Biscayne CID 427

PRO/RACE Pro Racer Harmonic Balancer - 6.61" OD - SFI 18.1 - Iron - Internal Balance - Pontiac V8 H778C31XL Polycarbanate spoiler blades (shown) areProduct Description: Harmonic Balancer Pro Racer 6. 61 in OD SFI 18. 1 Iron Natural Internal Balance Pontiac V8 Sold Individually Founded by renowned Australian drag racer Graham Withers , Pro Race Performance has produced performance engine components for more than 35 years. Pro Race is recognized for their All Steel line of crankshaft dampers, initially offered for the Holden 308 V8, and now offers high performance racing dampers for a wide range of