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Kartboy Transmission Mount Bushings (Part Number: )
Kartboy Transmission Mount Bushings (Part Number: )
Kartboy Transmission Mount Bushings (Part Number: )
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Kartboy Transmission Mount Bushings (Part Number: )
Kartboy Transmission Mount Bushings (Part Number: )
Kartboy Transmission Mount Bushings (Part Number: )
Kartboy Transmission Mount Bushings
Subaru Models (inc. 2002-2007 WRX/STi)
Read 30 Reviews | 3 Q&As
Part # KB-025

In stock! Ships same day

Features & Product Details

Kartboy transmission mount bushings are made out of a strong urethane to replace the factory bushings that are soft, and become super weak over time. These will install between the lateral and the horizontal support of the transmission. 

With that said the Kartboy transmission mount bushings will eliminate the flex that is caused by replacing the factory mount bushings that are super soft. You’re going to have improvements in the stability of the drivetrain, and you will feel a difference in shifting and you will eliminate any drivetrain slop under high-performance driving conditions.

Sold as a set of 4 bushings. 


Brand: Kartboy
Bushing Location: Transmission Support
Installation Hardware Included: No, reuses OEM
Material: Urethane
Mfgr. Warranty: Limited Lifetime Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.



30 Reviews
4.9 out of 5 Stars
5 Stars
4 Stars
3 Stars
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Customer Photos and Videos
Kartboy Transmission Mount Bushings ( Part Number: KB-025)
Kartboy Transmission Mount Bushings ( Part Number: KB-025)
Kartboy Transmission Mount Bushings ( Part Number: KB-025)
0 of 1 people found the following review helpful
Great value 12 months ago
5out of 5stars

Saw these on the site and thought I would give them a try... easy to install since my transmission mount was still in pieces from powder coating, and went together perfectly. Will wait to see how they hold up. The kartboy sticker is a nice addition and looks good on the mount crossmember!
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0 of 1 people found the following review helpful
Get the job done. 2 years ago
5out of 5stars

Installed these along with a Cusco transmission mount. Much firmer than the stock bushings (after 95k, anyway). Between the two, shifting feels much notchier and there's clearly less play between the engine and trans - especially when engine braking in lower gears. Catch point on clutch feels more defined, as well.
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0 of 1 people found the following review helpful
transmission mount bushings 2 years ago
5out of 5stars

installed on stock 05 STI, 120k miles on transmission at this time with stock STI shifter well, everybody else claims this removed the shifter slop, i personally felt no difference installing this thing, dunno if its worth your money or not. i personally felt the money spent on the "COBB Tuning Shifter Bushings Part Number: COB 213320" made more of a difference in the shifter feel if anything
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0 of 1 people found the following review helpful
Transmission cross bushings 3 years ago
5out of 5stars

Installed while I had the whole transmission out for major service. Installation went super easy they slide right together as they should have. Huge difference in how stiff to the chassis the drive line is. Worth the money.
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1 of 1 people found the following review helpful
Bang for buck upgrade! 4 years ago
5out of 5stars

I installed these x member bushings, sti group N trans mount, rear shifter stay bushings and shifter bushings, all from Kartboy, on my 05 Legacy 3.0r Spec B with the 6 speed- yes I can confirm these do bolt right up- and they make a huge difference. Gone from stirring soup to precise shifting action... Cheers RSD and Kartboy!
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  • Q: Which side goes against the bolts?  frank.8 months ago

    I just got some crossmember transmission bushings and was wondering how they properly go on. One side is flat and one side has the circles slightly protruding. Which side faces the bolts and faces away? Or does it not matter?
  • Q: Automatic  jroberts2 years ago

    Are these just for manual transmissions or automatics too?
  • Q: Will these fit?  4 years ago

    Hello, I own a jdm 2004 forester 2.0 xt with the lame 4-EAT automatic and my wife ordered these along with some other goodies for me. Someone's was telling me they will only fit the manual tranny...can you confirm this please?
    • 0 of 1 people found the following answer helpful

      A:  These bushings will only work on manual transmission crossmembers because automatic crossmembers do not use bushings.

      Zach G. @ RallySport Direct 4 years ago  
      Was this answer helpful?

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