CravenSpeed 17% Supercharger Pulley

CravenSpeed 17 % MINI Cooper S Supercharger pulley increases the rotating speed of the supercharger. Experience better boost for your buck with a bolt-on performance pulley made from stainless steel. Unlike most brands of reduction pulley, Craven Speed utilizes "truform" tooth profile, to eliminate drive belt damage. Smooth and form-fitting teeth provide maximum surface area contact with the belt. The Craven Speed race tested pulley utilizes a 2 piece collet style design that locks the pulley to the shaft. Four bolts are used to ensure that the pulley is secured flat to the hub. These bolts are rated to hold 800lbs each and are used to activate the collet-type clamp. Once installed, there is almost no force whatsoever applied to the bolts. It is widely accepted that this 17% size reduction pulley will gain you more low end than a 15% pulley.