Raybestos GPZ performance friction clutch pack module for the ZF 8HP70/8HP55 8-speed automatic transmission. The pack uses Raybestos' proprietary GPZ friction material, engineered to exceed OE friction material specs for higher heat tolerance, clamping capacity, and durability under repeated hard shifts. Fitment: vehicles equipped with the ZF 8HP70/8HP55 transmission, including BMW 3/5/7 Series and Dodge Charger/Ram models.