The Most Advanced PSRU’s Available for 150 to 300 HP Engines. Advantages Centrifugal Clutch Straight Cut Gears Separate Lubrication System Multiple gear ratios available PSRU for Eggenfellner Subaru Replacement to Retrofit Gearbox with Centrifugal Clutch and Flywheel Assembly The Auto PSRU’s  250Z Zero Offset PSRU for Subaru was developed as a replacement gearbox for Eggenfellner Subaru 4 and 6 cylinder engines. This gearbox has all of the same features of our original BW-350 PSRU, including the centrifugal clutch and flywheel assembly, plus all the new features listed below that make it the 250Za. Consequently, with this new PSRU, Subaru engine owners no longer have to tolerate the torsional vibrations that many … Continue reading 250Z PSRU