Rebuild service for uprated superchargers with reduction pulleys. These gears are exclusively made for TBMotorsport to drive the water pump at the correct speed to reduce the cavitation effect at higher engine revs and keep the engine temperature steady. Made at a 9% reduction to the standard gearing. This will allow a supercharger with a up to a 20% pulley to run the water pump the same speed or less than the standard JCW set up. Contact for more information.