BMW X-Drive 13-1 Transfer Case Upgrade

This product offers upgraded transfer case solutions for various vehicle makes and models, including BMW, Ford, Chevy, and others. It involves either sending in your transfer case or purchasing a core for in-house build upgrades, which include specific parts and friction materials.

• The description claims the coefficient of friction is greatly increased with the use of FSX frictions and C6X steels while maintaining stock-like shear translation.