Configurable solid bushing set has the ability to correct the control arm angle and CV joint angle on lowered cars by raising the subframe up against the body. Or use provided top spacers to keep subframe in OEM position and conform to Formula D rulebook. This comprehensive set replaces the OEM rubber bushings to increase response and accuracy while decreasing the ability of the drivetrain to move on the chassis. You can set this up four ways in E46 and E46-M3 -Raised subframe or stock position with or without reinforcement plates welded into chassis. ***See photos in gallery for configuration options. OEM studs with hex will be removed from the front position and replaced with our bolts supplied in the kit to allow bushings to sit flush against body. The OEM rear subframe flange bolts are re-used in the rear solid bushing installation (with a flat washer) which is why the bottom of the rear bushings have the funnel shaped extension on the bottom. Slip fit is easy to install in the garage without a press but may require epoxy if theres any loose tolerances in your subframe. Fits 1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3 , 09-2016 Z4