Billet Aluminum Oldsmobile Crankshaft Pulley 2 Groove Crank Pulley for Oldsmobile Engines (350 & 455). Designed for use with stock power steering and alternator brackets. APPLICATION ---Oldsmobile 350 Rocket & 455 engines FITS VEHICLES WITH: ---4.25" Tall Water Pump Diameter: 5.4" Overall Length: 2.20" Grooves: 2 Bolt Pattern: 4 Bolt Bolt Circle: 3.01" Pilot Diameter: 2.3".
