RAR Pontiac Underdriven 2 Groove 4 Bolt Crankshaft Pulley 1971-78- Black Powdercoat RAR-PUC4B

4-bolt, has same groove offset as 71-81 double groove pulley . Will fit all 68-81 balancers. Use with 71 & later bracketry for correct accessory alignment. Underdrive crank pulley consumes less engine power which increase power to rear wheels. Comes with stainless attaching hardware Available in Black, Polished.