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We have a take off ProCharger D1SC head unit from a customer who upgraded to F1R. This D1SC has a 4.38" pulley and was only on the car for 5k miles or less. The supercharger has no damage or problems that I am aware of.
Safe to assume this is a reverse rotation unit? Also what is the clocking of the unit? I'm extremely interested in this for a custom project I'm working on.