UPD 64mm m112k supercharger pulley is made of lightweight billet aluminum for reduced rotating mass and quicker clutch engagement. Lightweight means less belt slip as well. UPD 64mm pulley is only 1.5lbs verses well over 2 lbs for the stock 74mm steel pulley. Much easier and safer on engine parts to install verses adding a much heavier aftermarket crank pulley. Adding a smaller supercharger pulley will not turn your accessories faster verses adding an oversize crank pulley will greatly increase rpm on all your idlers, AC, power steering components and leading to early failure.

Increases horsepower and torque and equal to about a 185mm crank pulley in power and torque gains. Rear wheel HP gains with tune are averaging around 40-45 rear wheel hp and 45 to 48 torque with a simple pulley install!.

• 35% lighter than factory pulley, reducing rotational mass
• Reduced rotational mass increases supercharger longevity
• 64mm diameter
• Easy to install
• Special coating reduces belt slip
• Improved nitride coated clutch, plate and spring design

Tune will be needed for this pulley, as fuel and power increases will exceed factory tune parameters. Email for your tunes needs to Sales@ultimatepd.com