The BRZ and FR-S share a factory firewall design that flexes under hard braking, softening pedal feel just when precision matters most. The GRMGRM091038 GrimmSpeed Master Cylinder Brace addresses this directly with a CNC laser cut 12L14 steel bracket that uses four strut tower mounting points, more than any competing brace. Owners who install the GRMGRM091038 often describe the pedal improvement as comparable to upgrading to stainless steel braided brake lines. No cutting or permanent modification is needed, and the black powder coated finish is built to last well beyond the life of a typical brake line upgrade.
| Year Range | Make | Model |
|---|---|---|
| 2013-2020 | Subaru | BRZ |
| 2013-2016 | Scion | FR-S |
| Detail | Value |
|---|---|
| Part Number | GRMGRM091038 |
| UPC | Not published by manufacturer |
| Material | 12L14 Carbon Steel |
| Finish | Black Powder Coat |
| Mounting Points | 4 strut tower mounting points |
| Drive Configuration | Left hand drive only |
| 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 performance parts. What began with a focus on Subaru 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.
What is the GRMGRM091038?
The GRMGRM091038 is a GrimmSpeed master cylinder brace built for the 2013-2020 Subaru BRZ and 2013-2016 Scion FR-S. It reinforces the firewall around the brake master cylinder to reduce flex and improve pedal feel.
Does the GRMGRM091038 require any cutting or drilling to install?
No. The GRMGRM091038 uses existing strut tower mounting points and does not require cutting or modification of stock components.
What is the GRMGRM091038 made from?
The GRMGRM091038 is made from 12L14 carbon steel that is CNC laser cut and finished in a durable black powder coat.
Does the GRMGRM091038 fit right hand drive cars?
No. The GRMGRM091038 is only compatible with left hand drive BRZ, FR-S, and GT86 models.
Will the GRMGRM091038 damage my master cylinder?
No. The GRMGRM091038 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 GRMGRM091038?
Owners typically report a noticeably firmer, more responsive brake pedal after installing the GRMGRM091038, similar to the feel of upgrading to stainless steel braided brake lines.
How many mounting points does the GRMGRM091038 use?
The GRMGRM091038 uses 4 strut tower mounting points, the most available from any brace on this platform.
How long does it take to install the GRMGRM091038?
Most installers complete the GRMGRM091038 install in under 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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