10-rib Poly-v PK profile Pulley rings for Rotrex C38R Superchargers. Billet machined with black anodizing and laser engravings.
Sizing your pulley ring defines the supercharger speed and thereby the boost/horse power – be careful when sizing your pulley to prevent over-speeding your supercharger.
We’ve got a handy calculator, to help you to size your pulley – available here: Rotrex Calculators











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