GrimmSpeed Street Transmission Mount - All Subaru 5MT and 6MT

GrimmSpeed Transmission Mount – Lock Down Your Drivetrain

Take control of your drivetrain with the GrimmSpeed Transmission Mount, designed to pair perfectly with the GrimmSpeed Pitch Stop Mount. OEM mounts prioritize comfort over performance, but ours use 75A durometer polyurethane bushings that are up to 16x stiffer than stock—delivering sharper shifts, improved drivetrain stability, and greater confidence behind the wheel.

Built from 6061 billet aluminum and 304 stainless steel, this mount is fully assembled, includes all hardware, and features a press-fit stud for easy, precise installation. Compatible with most AWD Subaru 5MT and 6MT setups, with an included spacer for 5-speed models.

Despite track-ready stiffness, it’s daily-driver friendly with only a minimal increase in NVH.

Quick Specs:

• Billet aluminum & stainless steel construction

• 75A bushings for reduced movement & solid shift feel

• 2x stiffer than Group N, 5x stiffer than STI, 16x stiffer than WRX mounts

• Works with 5MT & 6MT Subaru manual transmissions (AWD only)

• Includes 5MT adapter spacer & all mounting hardware

Fitment:
2004–21 STI (6MT) · 2002–14 WRX (5MT) · 2015–24 WRX (6MT) · 2004–08 Forester (5MT) · 2005–09 Legacy GT (5MT/6MT) · 2005–09 Outback XT (5MT) · 1993–22 Impreza (5MT)
(Not compatible with BRZ/FRS/86 or automatic/CVT models)

Installation Instructions