Fits Mercedes 722.9 Transmission Raybestos Performance GPZ Friction Pack Module 2004-On Raybestos® Powertrain Mercedes 722.9 GPZ Clutch Pack® Module Module contains upgraded friction components as well as friction component manufactured with the unique blend of GPZ high energy fibers for ultimate stress and high temperature durability. Recommended Use: Heavy-duty vehicles, commercial vehicles, and high-stress driving enhanced performance applications increased horsepower and torque Clutch Pack Components: 6 B2 GPZ, 8 B1, B3 ID Spline GPZ, 5 K1 ID Spline GPZ, 5 K3 SS OD Spline GPZ, 5 K3 SS ID Spline GPZ, 5 K1 OD Spline GPZ, 5 G3 GPZ, 5 K2 OD Spline GPZ, 5 K2 ID Spline GPZ, 8 B1, B3 OD Spline GPZ Raybestos Powertrain GPZ plates greatly increase transmission performance and durability. This state-of-the-art friction material far exceeds OE material to withstand high stress, high temperatures and repeated cycling. GPZ plates outstanding performance benefits are perfect for heavy duty vehicles and high-stress driving. Testing GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases.