MMX Subframe Bushing Inserts BMW M135i M140i F20 F21

The MMX (formerly MMR) subframe bushing insert kit for BMW F2x is designed to limit subframe movement relative to the body.
This helps maintain suspension geometry in corners and improves rear suspension responsiveness.

Installation is very simple, can be done in under an hour and is completely
reversible.

By filling the small voids in the four original mounts and limiting vertical movement, the insert set helps eliminate the spongy chassis feel when high loads are applied as you push the chassis to its limit.

The aluminium parts, machined from solid, do not wear over time and provide a lasting performance improvement.