The strut tower firewall on the 08 and up Subaru WRX, STI, and Impreza platform has a known weak spot right where the brake master cylinder mounts, and that flex translates directly into a spongy, unpredictable pedal. The GRMGRM091029 GrimmSpeed Master Cylinder Brace was engineered specifically to solve this problem with a CNC laser cut 12L14 steel bracket that uses four factory mounting points. Installing the GRMGRM091029 delivers an immediate, tighter brake pedal that many drivers compare to switching to stainless steel braided lines, without any cutting or permanent modification to the car.
| Year Range | Make | Model |
|---|---|---|
| 2008-2014 | Subaru | WRX |
| 2008-2014 | Subaru | WRX STI |
| 2008-2014 | Subaru | Impreza |
| 2008-2009 | Subaru | Legacy GT |
| Detail | Value |
|---|---|
| Part Number | GRMGRM091029 |
| UPC | Not published by manufacturer |
| Material | 12L14 Carbon Steel |
| Finish | Black Powder Coat |
| Mounting Points | 4 factory mounting points |
| Installation Hardware Included | Yes |
| Brand | GrimmSpeed |
GrimmSpeed started as a small garage operation in Minneapolis, Minnesota in 2006 and has grown into one of the most trusted names in Subaru performance. What began with a focus on WRX and STI parts has expanded to Mitsubishi, Ford, MazdaSpeed, and Hyundai platforms, but the engineering philosophy has stayed the same: build parts that are tougher, smarter, and better finished than anything else on the market.
The GRMGRM091029 is a GrimmSpeed master cylinder brace for the 2008-2014 Subaru WRX, WRX STI, and Impreza, plus the 2008-2009 Legacy GT. It reinforces the firewall around the brake master cylinder to reduce flex and improve pedal feel.
Does the GRMGRM091029 require any cutting or drilling to install?No. The GRMGRM091029 uses existing factory mounting points and does not require cutting or modification of stock components.
What is the GRMGRM091029 made from?The GRMGRM091029 is made from 12L14 carbon steel that is CNC laser cut and finished in a durable black powder coat.
How many mounting points does the GRMGRM091029 use?The GRMGRM091029 uses 4 factory mounting points, more than most other braces available for this platform.
Will the GRMGRM091029 damage my master cylinder?No. The GRMGRM091029 includes a large diameter pressure cup that spreads contact pressure evenly to avoid marring or damaging the master cylinder.
What driving improvement can I expect from the GRMGRM091029?Owners typically report a noticeably firmer, more responsive brake pedal after installing the GRMGRM091029, similar to the feel of upgrading to stainless steel braided brake lines.
Does the GRMGRM091029 fit the Legacy GT?Yes. The GRMGRM091029 fits the 2008-2009 Subaru Legacy GT in addition to WRX, WRX STI, and Impreza models.
How long does it take to install the GRMGRM091029?Most installers complete the GRMGRM091029 install in about an hour using basic hand tools.
Operating, servicing, and maintaining a passenger vehicle or off road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service the vehicle in a well ventilated area, and wear gloves or wash hands frequently when servicing the vehicle. For more information visit www.P65Warnings.ca.gov/passenger-vehicle
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