For 1990-2009 cars

The supercharger is a positive displacement pump that consists of two counter-rotating rotors in a housing with an inlet port and an outlet port. The rotors are designed with three lobes and a helical twist. An air bypass circuit is built into the housing. The rotors in the supercharger are designed to run at a minimal clearance, not in contact with each other or the housing. The rotors are timed to each other by a pair of precision spur gears which are pressed onto the rotor shafts. The forward end of the rotors are held in position by deep-groove ball bearings. The back end of the rotors are supported by sealed roller bearings.

The gears and ball bearings are lubricated by synthetic oil. The oil reservoir is self-contained in the supercharger and does not rely on engine oil for lubrication.

The cover on the supercharger contains the input shaft which is supported by two, deep-groove ball bearings and is coupled to the rotor drive gears. The pulley is pressed and keyed onto the input shaft. These bearings are lubricated by the synthetic oil contained in the same reservoir as the gears and rotor bearings.