BBK Under Drive Pulley Kit 6 Rib Serpentine Aluminum Polished - Small Block Ford Tape Measure Premium stainless steel T-bolt clamps

Premium stainless steel T-bolt clamps and a reinforced silicone hump coupling are used for strength and durability while also providing the most secure installation available

For reducing cranks with 1/4" keyway to 3/16"

High-strength aluminum alloy componentsVehicle Applications: 2015-2021 Ford F-150Vehicle Applications: 2015-2021 Ford F-150

1967-1967 Dodge Wm300 Pickup

BBK Under Drive Pulley Kit 6 Rib Serpentine Aluminum Polished - Small Block Ford Tape Measure Premium stainless steel T-bolt clampsInstall 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