1988-1995 GM TRUCK 4.3/5.0/5.7L 3PC UNDER DRIVE PULLEY KIT (ALUMINUM) 2002 camaro These extension harnesses and bolt

These extension harnesses and bolt kit is required when Installing BBK 1633/16330 or 1856/18560 Headers on a 2015-2017 Mustang 5

All kits come with polyurethane mounting bushings and endlink kits

require extra support for optimal performance

BMW LL-01 and Ford WSS-M2C946-A

1988-1995 GM TRUCK 4.3/5.0/5.7L 3PC UNDER DRIVE PULLEY KIT (ALUMINUM) 2002 camaro These extension harnesses and boltInstall a set of BBK performance underdrive pulleys and see an average of 8 15 additional horsepower over the stock pulleys. Under drive pulleys increase engine output by reducing the draw of the engines accessories by slowing them down and reducing the HP they use. Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley which is why we recommend the BBK CNC Machined billet