Description
High-quality made in America. All pulleys are CNC-machined from aircraft 6061-T6 aluminum. Lighter, stronger pulleys. A small pulley is much less work for your engine to turn, giving you more HP to the power train. Estimated 10-12 HP.
Add throttle response to your V-10 with our new T6061 Billet Under-drive Pulley! Machined here in the USA from T6061 billet aluminum, dropping from the factory diameter pulley to our under-drive pulley slows down the unnecessary amount of power to the accessories, thus adding free HP and dropping your quarter mile times! During testing, we have seen on average 5-10 RWHP, and a tenth or two quicker in quarter-mile acceleration. This ONE-PIECE PULLEY made of strong billet comes with new bolts (when necessary).
* SRT 4/5 Under Drive Pulley comes with M8 X 1.25 bolts
Use 1 1-inch shorter belt needed, available from a local auto store. Not included.








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