Mechanism: Clutch pack
Horsepower: 350 to 400
Description: This is Eaton's bread-and-butter limited slip and is the type found in most GM cars. The new units use carbon-fiber clutches. You can upgrade them by running heavier springs. These may chatter when first installed. McMillan recommends adding two bottles of Ford SVO limited-slip additive and doing a bunch of figure-eights in a parking lot to break in this unit.