BBK Under Drive 6-Rib Serpentine Pulley Kit - Polished Aluminum - Small Block Ford - Ford Mustang 1979-93 GT6 Pro Billet Mount

Billet Mount

1966-1976 Ford F-250

12' lengths are commonly used for FRONT seat passengers

Engine Gasket Kit

Valve stem behind center in window

BBK Under Drive 6-Rib Serpentine Pulley Kit - Polished Aluminum - Small Block Ford - Ford Mustang 1979-93 GT6 Pro Billet MountInstall 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