Torsen Differential - High-Performance Upgrade for BMW Models Versatile Performance : Perfect for demanding daily driving, rally, rallycross, track days, and drag racing. Maintenance-Free Durability: Unlike LSD differentials, the torsen differential contains no wear parts, making it unbreakable and virtually maintenance-free. Exceptional Quality: High-quality construction with a premium finish comparable to Quaife. Dynamic Power Distribution: Instantly transfers power to the wheel with the most grip, using precision-engineered gears for enhanced traction and control. Vehicle Compatibility:  This torsen differential is compatible with the following BMW models and configurations: E60: 525d (up to 03/2007), 530d, 535d E46: 330d (manual transmission) E39: 530d (manual transmission) E38: 730d E90: 325d (manual transmission up to 03/2007), 330d (manual transmission up to 01/2007) F21: 125d (automatic transmission) F32: 430d (2.56 final drive) E39: 540i (M62 4.4L) E82/E88: 135i (N54/N55 3.0L)