HOW DOES UR DO IT?
By reducing rotational weight which means your engine revs up faster, freeing up HP/TQ for improved acceleration. For some applications we add even more HP/TQ by turning the engine accessories slower, a method called underdriving. Underdriving the accessories (alternator, a/c, power steering & water pump) stops them from robbing more power than they need to run efficiently. When underdriving we tune in the max possible amount without hurting accessory function, we call it “OE SAFE” underdrive. Underdrive crank pulley/sets can add 10-15% more HP/TQ than our stock diameter version. We can also increase HP/TQ gains even more by adding accessory pulley. Accessory pulleys are available in pulley sets or separately (alternator, a/c, idler, power steering, tensioner & water pump). If a crank pulley is your only option don’t worry, if we make accessory pulleys in the future you will be able to add them.