Established in 1998, China Xiaowei Bearing Co., Ltd. is a high-tech enterprise specializing in blower pulley manufacturer and design many kinds of bearings. We have a modernized staffs of tech research and fog machine development, ISO9001 certificated, and manufacturing adopts advanced domestic and foreign standards such as GB, API, JIS, DIN, BS, NF and ANSI.

One of the easiest ways to pump up the power of your supercharged Cobra is to increase the factory boost level with the award winning MOTOBLUE Interchangable "QC" Pulley System.
The MOTOBLUE Interchangeable QC Blower Pulley System for the Eaton supercharger. The factory Eaton blower pulley is pressed onto the shaft - which makes quick, trackside changes impossible. With the MOTOBLUE Interchangeable QC Blower Pulley Kit you simply replace the factory blower pulley with a precisely machined hub and attach your choice of pulleys with the 5 Allen head set screws provided.
Running a larger pulley on the street saves fuel, while the 2.75" bumps the boost for a very noticeable performance gain. Consider the time you'll save by installing this system Best of all you dont pay the high price other manufactures are trying to charge for the same technology.
CNC Machined 6061-T6 POLISHED Billet Aluminum Pulley.
POLISHED billet 2.75 dia. produce up to 7 lbs. of additional boost with computer tuning
CNC Machined 4150 hardened STEEL Nitride Coated Hub Assembly
5 Grade 8 Allen head bolts to secure the pulley of your choice
The MOTOBLUE "QC" BLOWER Pulley Kit is the "must have replacement for all press-on aftermarket supercharger pulleys.
Installation time is around hour and will require a pulley puller/installation tool.

This smaller blower pulley allows generation of greater torque at lower speeds by increasing the boost available at low RPM.