MRT Engineering Roll-centre and Bumpsteer Correction Kit for E46 M3 and Z4 M. These are vital for correcting the front suspension geometry on lowered examples.

20mm of roll-centre and bumpsteer correction +/-5mm adjustability on bumpsteer. This kit retains original ackermann angle making it perfect for track/race use (non-drift). Fits all control arms with 33mm bore (OE specification), threading tool included.

Kit includes full instructions and all hardware.

420mm inner wheel diameter required.