Tech-53 Differential Bushing Kit for BMW E46 SpecificationsOn BMW E46 Z4 and E83 models the OEM differential bushings tend to wear out quickly. These models share a similar rear subframe which houses two front bushings and a larger one at the rear. Made of rubber these parts are effective at absorbing vibrations but they deteriorate over time — even under normal daily driving.When the bushings are worn the differential starts to move with every acceleration causing clunking noises and putting other components such as the driveshafts under abnormal stress. This is why replacing them is essential to preserve the performance and reliability of your drivetrain.This kit is designed to permanently eliminate these issues. It includes three bushings made from Delrin a material as strong as aluminum but much better at filtering vibrations. The inner sleeves are machined from aerospace-grade 6061-T6 aluminum combining lightness and strength. Unlike other kits this one features a unique design: a special inner sleeve compresses the differential against the subframe once the bolts are tightened ensuring a firm play-free fit.This kit is perfectly suited for track use or spirited driving while remaining relatively comfortable for road use. It comes with a lifetime warranty.Kit Contents:2x front differential bushings (replaces 33176770788)1x rear differential bushing (replaces 33176751808)Compatibility:BMW 3 Series E46 (1999–2005 non-M)BMW 3 Series Spec E46 (2001–2006)BMW X3 E83 (2004–2006)BMW Z4 (2003–2006)Installation tip: Place the aluminum sleeves in the freezer before installation to ease the press-fit process.