Fits GM Chevy 700R4 4L60 4L60E 4L65E HIGH PERFORMANCE 3-4 ZPAK Clutch KIT 1982-2014 The Z Pak® is a problem solution for enhanced performance rebuilds in which the OE clutch pack is prone to failure. Recommended Use: Heavy-duty vehicles, commercial vehicles, and high-stress driving enhanced performance applications 3-4 Z Pak® Clutch Pack Module Friction Material Type: Raybestos Powertrain GPZ friction 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's outstanding performance benefits are perfect for heavy-duty vehicles and high-stress driving. Testing of GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases. Advantages: Significantly reduces maximum core temperatures Outperforms single and double sided OE clutches Perfect for every rebuild including heavy duty Eliminates coning under high stress Increasing transmission durability Increases torque capacity Made with GPZ material