The ATS Transfer Case Upgrade Kit is the ultimate performance solution for the ATC13 transfer case found in 2015+ BMW cars and SUVs. Designed to resolve common failure points and increase torque handling, this kit replaces weak OEM components with precision-engineered upgrades built to perform under stress. What’s Included: ATS 4140 Performance Clutch BasketMachined from high-strength 4140 steel for increased clutch capacity and superior heat dissipation compared to the stock unit. Upgraded Clutch PackUses 11 total discs (up from 9 OEM) with ATS steels and high-friction fibers for improved torque transfer. Plastic Components & SealsIncludes all the plastic internals and sealing components needed for a complete, trouble-free installation. This is the only aftermarket performance clutch basket available for the ATC13—developed by ATS with precision, power handling, and longevity in mind.