WiseFab - BMW E9x M3 Rear Suspension Kit (WF901M) sc300 The normal Z33 kit features

The normal Z33 kit features a separate spring and shock setup for the rear

They fit underneath the factory molded urethane chin

AP1 and AP2 spacers

The APR Brake Cooling Ducts are aerodynamically-optimized to "funnel in" massive amounts of air

WiseFab - BMW E9x M3 Rear Suspension Kit (WF901M) sc300 The normal Z33 kit featuresWisefab BMW e9x rear suspension kit can be fitted on a variety of BMW models. E90, E91, E92, E81, E82, E87, E88 models. All the metal components on E90 rear suspension are from high strenght steel, including sheetmetal components, tubes, tube ends and rod end housings. Also for weight reduction and stiffness purposes all the suspension links are designed straight and tubular or boxed type. Rod ends and spherical bearings used, no rubber bushings. M