Increase boost and add tire-shredding horsepower!Steeda's GT500 supercharger pulley directly replaces the factory supercharger pulley and gives approximately 3 PSI of extra boost.Manufactured out of billet steel, not aluminum like others on the market and nickel-plated for durability and great looks.Also available for the Ford GT supercar (not shown).In house testing has shown increases of over 125 HP and 100ftlbs of Torque to the rear tires!!! (Tested on GT500 with Steeda CAI, Pulley and Tune)Notes: This product requires a custom tune. Product BenefitsMore Horsepower and Torque to the rear tires!!100% made in the USA by Steeda.Exceeds OEM Quality, with superior durability.This is a NEW blemished item. This part has blemishes in the machined finish. It is in fully functional shape and its mechanical functionality. The condition can be seen in the pictures and if there are any questions please feel free to ask before offerding. All returns are subject to a 20% restocking fee. Items ship to United States only. Payment through PayPal accounts with US based addresses only. Free shipping applies to the Contiguous United States only Payment through PayPal accounts with US based addresses only. As well as free shipping applies to the Contiguous United States only. Please note that it is our company policy to ship with an indirect signature required. Please let us know at the time of purchase if you would like this to be any different. Thank you!