MMX Performance Shifter Carrier Up-Rated Rear Mount

BMW mounts the G8x shift carrier on rubber to keep gearbox vibration out of the cabin. It does that job well, but it comes at a cost. Under load the carrier moves, so part of every input goes into flexing the bushing before it ever reaches the gearbox. That's the vague, imprecise feel you notice most when you're shifting quickly or driving hard.

The MMX Performance up-rated mount solves that at the source. The housing is machined from solid 6061-T6 aluminium and black anodised, holding 80A polyurethane bushings that keeps the carrier firmly located while still allowing the small amount of articulation the factory design relies on. The result is a shift pattern that feels tighter and more mechanical, without the harshness of a solid mount.

It's designed to work whether you've kept the factory lever or fitted a short shift kit. With an SSK it makes even more sense: a shorter throw makes any slop in the carrier far easier to feel, and firming up the rear mount lets the kit deliver the precision it was bought for.

The MMX OEM Shifter Up-Rated Mount (MMR14-1602) replaces the soft factory rear carrier bushing on the manual BMW G8x M2, M3 and M4 with a CNC-machined 6061-T6 aluminium mount and 80A grey polyurethane bushings. It takes the rubbery movement out of the shift carrier so every gate feels more defined, works with both the factory shifter and short shift kits, and keeps NVH at a level you'll happily live with every day.

Fitment is a direct replacement for the factory part, with no cutting, drilling or modification, so it's a straightforward upgrade that can go back to stock if you ever need it to.

Product Details

• Direct replacement for the factory rear shift carrier bushing (OEM 25118623459)
• 80A durometer grey polyurethane construction with a black anodised 6061-T6 aluminium housing
• Reduces shift carrier movement for a sharper, more defined shift pattern
• Compatible with OEM shifters and short shift kits
• Direct fit with no cutting, drilling or modification required
• Minimal increase in NVH, suited to road and track use

Fitment (manufacturer): Fits manual-transmission BMW G80/G81 M3 and G82/G83 M4 (2021+) and G87 M2 (2023+) with the S58 engine. Manual transmission only.

Brand: MMX Performance   Part #: MMR14-1602

Emissions: no CARB EO number is listed for this part. Check your state's emissions laws before street use.