These subframe bushings will fit all factory e36 and e46 rear subframes. Doing this stuff for over a decade led us to the decision POM (polyacetal) a much better choice for motorsports or powerful street cars compared to Aluminium or Polyurethane. It superseds the two mentioned in every necessary aspect for subframe bushings! Some Wikipedia: POM, also known as polyacetal is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability... Typical applications for injection-molded POM include high-performance engineering components such as small gear wheels, eyeglass frames, ball bearings, ski bindings, fasteners, gun parts, knife handles, and lock systems.