Founded in 1995 and as a member of China National Crane Conveyor Machinery Association, China Chuanda Conveyor Belt Co., Ltd. is a specialized step pulley manufacturer and custom step pulleys designer of various kinds of conveyors, belts, pulleys, bearings, rollers, bushings and so on. Through modern scientific management, excelsior products and technological design, advanced production tools and strict testing methods, we have produced various types of conveyance equipment. In 2001, we were certified by ISO9001: 2000, which has ensured the reliability and stability of product quality. Also, we have passed Germany DQS authentication in the domestic same trade. We have established long-term relationships with some famous mechanical manufacturers both at home and abroad, such as Veit GmbH, Hashima, Oshima, Summit, and KDK companies.

For 4L or 1/2-by-11/32-inch A belts
Die-cast
4-inch diameter
Returns will not be honored on this closeout item
Limit 1 per order
The Chicago die-cast, V-groove, four-step pulley comes with hollow head set screws. For belts size 4L or 1/2 by 11/32 inches. Dimensions: 4-inch diameter with 3/4-inch bore.Furnished with hollow head set screws. For 4L or 1/2'' x 11/32'' belts. The spacers are available in different widths and register bore hole sizes to match your specific engine application and supercharger model. Included is an installation CD and tool that with a moderate amount of mechanical ability makes installing the supercharger pulley the ideal weekend project. We've been told that it makes a great gift for the Mini Cooper S Enthusiast too. For the even more adventurous, changing to a 19% reduction pulley will have the boost kicking in 750rpm sooner than the 15% pulley. The 19% Mini Cooper S Supercharger Pulley is ideal for street driving conditions ONLY! It is not recommended for the long high revving situations typically seen on the racetrack! Sustained 6000-7600rpm generates more heat reducing the 19% pulley's effectiveness.

For 4L or 1/2-by-11/32-inch A belts
Die-cast
4-inch diameter
Returns will not be honored on this closeout item
Limit 1 per order
The Chicago die-cast, V-groove, four-step pulley comes with hollow head set screws. For belts size 4L or 1/2 by 11/32 inches. Dimensions: 4-inch diameter with 3/4-inch bore.Furnished with hollow head set screws. For 4L or 1/2'' x 11/32'' belts. For a minimal amount of money, the MINI Cooper S Supercharger Pulley can make even the Monday commute seem like a run around Laguna Seca. The stock pulley is one of the first things BMW MINI Cooper S owners replace to increase the performance of their car. Changing to a 15% smaller supercharger pulley on an otherwise stock motor has been shown, through independent testing, to provide increases of 15-20 horsepower with similar increases in torque. The smaller supercharger pulley causes the unit to spin faster and create more boost. More boost=bigger grin! Stock Mini Cooper S engines will see a 3-4 pound increase in boost. Add to that a modified intake or exhaust and your Mini Cooper S will have even bigger power gains.

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