\ Power Pulleys for Raptor Superchargers from 928 Motorsports®

Power Pulleys for Raptor Superchargers

Fits all Superchargers with a 17mm or 0.669" shaft

6-rib Pulleys Available for 17mm shafts:

TOP QUALITY! Our supercharger pulleys are made from a single 6064 alloy aluminum billet, and turned to an accuracy within .001 of an inch. Unlike poorly-made pulleys that have straight-cut belt vees - that cause belt slippage - ours are properly V-Cut for maximum belt contact! Then, the Red and Blue pulleys are sent off to be anodized for toughness and good looks. Natural-finish (silver) pulleys are not anodized.

DIAL IN YOUR BOOST! Measure your current supercharger pulley across the belt lands as shown in the photo below. The next smaller size pulley will create more boost than you have now. Racers also exchange pulleys to bring the boost in right where they want it to match their gearing.

A GENERAL RULE of THUMB: on a properly tuned and fueled engine, you should gain about 20 HP per 1 PSI of boost++.

What is the right-size pulley for your application?
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++All PSI estimates based on a crankshaft pulley being 6.5" in diameter operating at 6,000 RPM

Item Pulley Size Part Number Price (USD) Shipping* Availability
Power Pulleys for Raptor Superchargers U.S. Only: $11.00
All Others:
In Stock! Typically Ships Same Day!

* Domestic US shipping shown. International shipping will be calculated based on location.