Chevy Big Block Crankshaft Pulley 3 Groove, Short Water Pump (396-427-454) Underdrive diameter for Increased Horsepower! This pulley has been CNC machined in the USA from a solid bar to ensure that it is balanced and runs perfectly true. We machine them at ultra high speeds to get an amazing surface finish and then hand polish each part to a mirror finish so that it really makes your engine stand out from the crowd. Don't spend hundreds or even thousands of dollars building an engine and then throw an out of round chrome pulley on the front of your engine! Our billet aluminum pulleys reduce weight, increase horsepower and are balanced better than any chrome or steel pulley on the market. Technical Specs: Note: Big Block Short Water Pumps (SWP) are 5.75" from face of water pump to block. Crankshaft Pulley BBCS3CR Grooves: 3 Diameter: 5.
