Moroso Billet Single Groove Crankshaft Pulley - BB Chevrolet - Single Groove - 1968-Earlier (With Short Water Pump) - 30% Reduction - 5.25" O.D. YA0828KARTMM04 The smooth 1-5/8 in tube

The smooth 1-5/8 in tube design provides ample exhaust flow to let your C10/C20

50 Inverted Flare Male

Discharge Nozzles / Fittings

We're reinventing the ownership experience through our own relentless drive to serve our customers both on and off the road

3/8 in Hose Vented

Moroso Billet Single Groove Crankshaft Pulley - BB Chevrolet - Single Groove - 1968-Earlier (With Short Water Pump) - 30% Reduction - 5.25" O.D. YA0828KARTMM04 The smooth 1-5/8 in tubeMachined from solid billets of the highest grade aircraft aluminum for maximum durability Deep precision machined grooves ensure belt retention even during extreme changes in engine RPM When crankshaft and water pump pulleys are used together, water pump speed is reduced by approximately 30% Hard coat anodized for extended life Moroso Performance Products is one of the worlds most respected suppliers of automotive equipment for racing and street