BBK 86-93 Mustang 5.0 Underdrive Pulley Kit - Lightweight CNC Billet Aluminum (3pc)

Doing some work on your 1979-1993 Mustang 5.0 and looking to squeeze a little more out of the engine? Swapping out the stock pulleys for a set of BBK's underdrive pulleys can help. These pulleys slow down your engine's accessories, like the water pump and alternator, which means they draw less power from the crankshaft. Less draw means more power is available to turn the wheels.

This kit is made from CNC machined billet aluminum, making it lighter than the factory pulleys. Reducing rotational mass is another way to free up a bit of horsepower. BBK designs these as direct bolt-on replacements, so you can reuse your existing serpentine belt and factory hardware. This kit includes the crank, water pump, and alternator pulleys, giving you a complete set to replace the main accessory drives.

When you install these, you're looking to gain a few horsepower, typically in the 8-15 HP range, by reducing the parasitic drag from the accessories. It's a solid way to get a little more performance out of your 5.0, especially if you're already in there doing other engine work.