SBC Black Pulley Set, 2-Groove Upper/3-Groove Lower, Short Pump

Pair up a new set of pulleys sure to match for your Small Block Chevy equipped with a short-style water pump.  These convienent combos feature a satin black finish. Satin black finish. Steel construction. Lightweight. For Small Block Chevy short style water pumps. Double groove water pump pulley for two V-belts. Combine separate 2-groove and 1-groove crank pulleys to make one 3-groove for three V-belts. Kit Includes: (1) SBC Satin Black Short Water Pump Pulley - Double Groove. (1) SBC Satin Black Short Pump Crank Pulley - Double Groove. (1) SBC Satin Black Short Pump Crank Pulley - Single Groove. SBC Satin Black Short Water Pump Pulley - Double Groove Diameter is 6-1/4" Outside Length: 3" Mounted Length: 2.71" Shaft Diameter: .63" Bolt Hole Pattern: 4 on 1.75" Belt Width: .38" Replaces GM # 3995642. SBC Satin Black Short Pump Crank Pulley - Double Groove Diameter is 6-3/4" Overall Thickness: 1-1/4" Stock"Shallow" variety. Replaces GM # 374403. Use in conjunction with single groove crank pulley (91038812) for 3-groove pulley combo. SBC Satin Black 3rd-Groove Crank Pulley - Single Groove Use in conjunction with double groove crank pulley (91038811) to make 3rd groove. Diameter: 6-3/4" Replaces GM # 3751232. Notes: It may be necessary to shim either or both of the pulleys to achieve perfect belt alignment. There are variances between manufacturers of both water pumps and pulleys. Water Pump Pulley: Mounted length is from the face of the water pump pulley mount towards the front of the engine. Crank Pulley: Mounted length is from the face of the harmonic balancer towards the front of the vehicle. Get the correct pulleys for your application by learning which water pump you have as explained in our tech article. SBC - Short vs Long Water Pump.