GrimmSpeed Street Transmission Mount All Subaru 5MT and 6MT | 123041ST – Import Image Racing
Skip to content
GrimmSpeed Street Transmission Mount All Subaru 5MT and 6MT | 123041STR
GrimmSpeed Street Transmission Mount All Subaru 5MT and 6MT | 123041STR
GrimmSpeed Street Transmission Mount All Subaru 5MT and 6MT | 123041STR
GrimmSpeed Street Transmission Mount All Subaru 5MT and 6MT | 123041STR

GrimmSpeed Street Transmission Mount All Subaru 5MT and 6MT | 123041STR

Rated 5.0 out of 5
Based on 3 reviews
SKU: grm123041STR
Availability: Out Of Stock
Product Type: Drivetrain Transmission Mounts
$236.55
$249.00
$236.55
Save $12.45

BuildBUX Rewards

Great news – on this purchase, you'll enjoy a BuildBUX bonus of $2.37.

Regular Price: $249.00 - Instant discount: $12.45 = $236.55

Subtotal: $236.55

Fitment Information:

  • 2004-21 Subaru STI (6MT)
  • 2002-14 Subaru WRX (5MT)*
  • 2015-24 Subaru WRX (6MT)*
  • 2004-08 Subaru Forester (5MT)*
  • 2005-09 Subaru Legacy GT (5MT/6MT)*
  • 2005-09 Subaru Outback XT (5MT)*
  • 1993-22 Subaru Impreza (5MT)*

The core of this upgrade is 75A durometer polyurethane bushings, which keep the transmission from moving under high torque without transmitting excessive drivetrain noise and vibration to the chassis.

This part retains OEM fitment for almost all AWD Subaru manual transmission setups. There is a minor difference between the 5 and 6 speed models, but it is an easy fix by using the included 5-Speed Adapter Spacer between the stainless steel bracket and transmission cross member. 

Install is a breeze since Grimmspeed uses an OEM-inspired press-fit stud in the stainless steel bracket. This minimizes the risk of misalignment or damaged hardware. This Transmission Mount will arrive fully assembled and ready to install, and all required mounting hardware is included in the kit.

PERFORMANCE:

From the factory, Subaru offers multiple levels of their own transmission mounts, with the softest being the WRX, OEM STI in the middle, and then Group N as their stiffest option. But even the Group N leaves a lot of control left on the table.

With the 75A durometer bushings included on this Transmission Mount, this is 2 times stiffer than the Group N mounts, which makes them 5 times stiffer than the stock STI mount, and a staggering 16 times stiffer than the stock WRX! That means that the improvement in transmission and drivetrain control will be felt coming from any of the factory options.

Even though this setup is designed to feel right at home on a track-prepped vehicle, there is no need to fear daily driving with it. Grimmspeed has tested a variety of bushing stiffness's and found that these offer the best balance for on-road use, making certain that there is a minimal increase in NVH during normal driving. 

QUICK SPECS:

  • Robust 6061 Billet Aluminum and 304 Stainless Steel Construction
  • Red 75A Durometer Bushings for Reduced Transmission Movements and a More Solid Shifter Feel
  • Compatible with both 5-Speed and 6-Speed Manual Subaru Transmissions
  • Kit Includes and Adapter Spacer Required for Proper Geometry with 5-Speed Manual Transmissions

*Not compatible with 4/5 Speed Automatic or CVT Models

The GrimmSpeed Transmission Mount is only compatible with AWD Subaru transmission, meaning they are not compatible with the RWD Aisin AZ6 transmission found in BRZ/FRS/86 models.

average rating 5.0 out of 5
Based on 3 reviews
  • 5 Stars
    3 Reviews
  • 4 Stars
    0 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
Customer photos and videos
Review posted
Reviewed by Nickolas H.
Verified Buyer
Rated 5 out of 5

Solid

With this and the white line bushings I feel there is now now delay in shifting. Everything is so crisp and smooth now.

Vibrations are a bit more. Especially on start up but decent install. I would recommend it if you want to change the feel of driving with not a lot of work

Loading...
I recommend this product
Was this helpful?
Review posted
Reviewed by Craig H.
Verified Buyer
Rated 5 out of 5

This worked great with my new crossmember bushings

Really helped change how my car drives. Much smoother shifting experience

Loading...
I recommend this product
Was this helpful?
Review posted
Reviewed by Craig
Rated 5 out of 5

5 Stars

Cant wait to install this next week!

Loading...
I recommend this product
Was this helpful?

Reasons to get BuildBUX GOLD?
We could name a few

BuildBUX Gold: $4.98/mo

More Cashback

Get more cashback! Items are changing weekly. Anywhere from 1% to 20% Back in BuildBUX when you make purchases. Products

Free Money

Every month when you are charged your $4.98 subscription fee, you will get $15 in BuildBUX

Easy To Cancel

Cancel anytime, month to month terms.

Get Started

BuildBUX: Free

Cashback

Get 1% back on every purchase on eligible brands.

Free

Completely free to use. Just place an order!

Get Started

Thanks for subscribing!

This email has been registered!

Shop the look

Choose Options

Edit Option
is added to your shopping cart.

Choose Options

this is just a warning
Login