MMX Performance BILLET DIFFERENTIAL INSERTS | BMW F2x | F3x BM3 Go lower or stiffer than

Go lower or stiffer than these MMX Springs and your car will bounce and crash as the dampers are mismatched to spring-rate

Engineered and tested to work perfectly with stock dampers

toe-out and zero toe

and louder noise

MMX Performance BILLET DIFFERENTIAL INSERTS | BMW F2x | F3x BM3 Go lower or stiffer thanDesigned and engineered in house in the UK, the MMX differential insert kit for the BMW F2x and F3x chassis is designed to limit movement in the factory diff mounts to maintain proper suspension geometry when cornering and improve the responsiveness of the rear suspension and diff. Installation is very simple, can be performed in under an hour, and is completely reversible. By filling small voids in the four factory mounts as well as limiting vertical