Tech-53 Rear Subframe Bushing Kit for BMW E46 SpecificationsOver time the factory rear subframe bushings on BMW E46 models degrade affecting handling stability and ride quality. To address this known weakness Tech-53 has developed a high-performance replacement kit engineered for a perfect fit and exceptional durability.This kit combines lightweight yet strong aerospace-grade 6061-T6 aluminum inner sleeves with rigid Delrin bushings that eliminate unwanted flex. Unlike solid aluminum mounts Delrin offers outstanding stiffness while maintaining a level of comfort — minimizing noise and vibration without compromising performance.In addition to improving chassis response and rear-end feel these bushings preserve correct alignment under high loads. Tested on race cars including drift builds making over 500 wheel horsepower they’ve proven reliable on both track and street.Two mounting options:Standard fitment: install all components to retain OEM subframe height.Raised fitment: omit the upper bushings to raise the subframe by 0.5 (1.27 cm).Raising the subframe is especially beneficial on lowered vehicles. It helps reduce CV axle angles — extending their lifespan — and corrects suspension arm geometry enhancing cornering stability.Kit contents:4x rear subframe bushings in Delrin4x inner sleeves in 6061-T6 aluminum4x upper bushings in 6061-T6 aluminumVehicle compatibility:BMW 3 Series E46 (1999–2006) – all modelsBMW Z4 (2003–2008) – 2.5i / 3.0i / 3.0si / M Roadster / M CoupeInstallation tip: Freeze the aluminum sleeves before installation to ease fitment.