Rotrex superchargers utilize a unique traction drive system that sets it apart from other centrifugal-style superchargers. For best performance, Rotrex recommends replacing this fluid every 50,000 miles. This bottle of traction fluid is plenty enough for one supercharger service (typically 750ml).
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This Planetary OverDrive system allows you to stick with your factory BMW high-pressure fuel pump while unlocking the flow needed for big-turbo builds.
