BBK Under Drive Pulley Kit 6 Rib Serpentine Aluminum Polished - Small Block Ford AS04421 Single 14-16 ga

Single 14-16 ga

Cut to Fit Axles

1992-1999 GMC K2500 Suburban

00 Female to 4 AN Male

More Spark Duration

BBK Under Drive Pulley Kit 6 Rib Serpentine Aluminum Polished - Small Block Ford AS04421 Single 14-16 gaInstall 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