Weiand 6-71 Supercharger Kit Big Block Chevy (Standard Deck) Drive Pitch: 1/2″

Weiand 7583P Details 6-71 Superchargers – Chevrolet Big Block 35 Tooth Lower Pulley 38 Tooth Upper Pulley Note: This kit includes two extra 1/8″ NPT plugs. Your manifold may have two 1/8″ NPT ports tapped in the back of it. These are vacuum / boost ports that can be used for a boost gauge, boost reference power valves, or any other items that need to be connected to a boost / vacuum source. If these ports are not needed, use the included plugs to block these ports. Pop Off Valve Installation Guide Specifications: FinishPolished Blower Size6-71 Manufacturer’s Part Number:7583P Shipping Weight:75 Package Height:29 Package Depth:22 Package Width:23