3.0T FSI Lightweight Supercharger Crank Pulley

The JHM HD Overdrive Lightweight Crank Pulley is a performance upgrade for Audi 3.0T FSI engines, designed to replace the OEM crank pulley and reduce rotating mass. This pulley weighs only 5.05 pounds, a reduction of over 40% from the stock 8.57-8.62 pound component, which can help free up horsepower. The 179mm pulley also increases the amount of belt contact, enhancing grip and preventing slippage that can occur with smaller aftermarket supercharger pulleys, while achieving the same supercharger speed as a smaller pulley. Installation is similar to the OEM pulley, requiring the offset bolt hole to align correctly. All eight 8mm x 1.25 Allen bolts are included, and torque should be set to 20 ft-lbs in a star pattern, with Loctite recommended. A 7PK1290 belt is required for this 179mm crank pulley when used with stock or 56mm-57mm blower pulleys. For the C6 A6 3.0T, a 7PK1300 belt is recommended due to potential difficulty with the 1290 belt. This product is intended for off-road use and racing competition ONLY and is not legal for highway or street vehicles. It replaces OEM part numbers 06E 105 251 E, 06E 105 251F, and their variations. It is designed to fit various Audi models including A6 (C6 and C7), SQ5 (B8-B8.5), S5 (B8-B8.5), S4 (B8-B8.5), Q5 (B8-B8.5), and A7 (C7-C7.5), all equipped with the 3.0t V6 24v SC engine. A Prop 65 warning is also included for potential California-related reproductive harm. **Note:** This JHM Overdrive Crank Pulley is an alternative for smaller supercharger pulleys and may require stage 2 software. Customers have independently reported using it with a smaller supercharger pulley to spin the supercharger faster, though this may increase wear on the supercharger unit. Always consult with your software provider before combining modifications.