Fits 1988-1995 GM Truck 4.3/5.0/5.7L 3Pc Performance Under Drive Pulley-1603 chokes 7 L V8 2012 -

7 L V8 2012 - 2014 Chrysler 300 S 345/5

06/8 V 2008 - 2013 Chevrolet Corvette 4

Engine small or big block Big Block

These heavy duty thick clear poly bags have the Mr

Fits 1988-1995 GM Truck 4.3/5.0/5.7L 3Pc Performance Under Drive Pulley-1603 chokes 7 L V8 2012 -Install 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