Perrin 15+ Subaru STI / 16+ Subaru WRX / 13-17 Crosstrek / 14-18 FXT / 12-16 Impreza Master Cylinder Brace - Black (perPSP-BRK-403)

Regular price $136.80 USD Sale price $136.80 USD Regular price $160.00 USD
Sale 14.5% $23.20 USD (14.5%)
Special order - Ships in 5+ weeks
Product Description

The PERRIN Master Cylinder Brace prevents unwanted movement of the master cylinder, allowing for increased brake pedal stiffness and response. Your brake pedal is connected to the thin sheet metal firewall which flexes as you apply the brakes. The firewall is not stiff enough to deal with the constant and repeated forces while applying the brakes. The PERRIN Master Cylinder Brace creates a bridge between the firewall, master cylinder, and shock tower, significantly reducing flex in the firewall while braking. The PERRIN Master Cylinder Brace significantly reduces flex at the firewall, so you get a solid brake pedal feel with every application of the brakes. This is very noticeable while under heavy braking and even slowing for a stop sign. The difference can immediately be felt after installation. When possible we try to design Master Cylinder Braces in one piece to improve rigidity. The PERRIN Master Cylinder Brace for 2015+ WRX/STI is CNC machined from a large piece of 6061-T6 billet aluminum for extreme stiffness. With stainless steel hardware and an anodized finish, the PERRIN Master Cylinder Brace will look great and last the life of the car, even in the harshest conditions. The PERRIN Master Cylinder Brace is designed to attach strategically to multiple points on the shock tower. This helps reduce flex in the brake master cylinder by creating a solid connection between it and the chassis. To further aid in stiffening or tightening up this connection, included is an adjustable screw that allows tension to be preloaded on the master cylinder. Anodized black and neon yellow with a vivid PERRIN logo, the PERRIN Master Cylinder Brace for 2015+ WRX/STI is guaranteed to continue looking great while being used.


  • Subaru Impreza (2012, 2013, 2014, 2015, 2016)
  • Subaru Forester/XT (2014, 2015, 2016, 2017, 2018)
  • Subaru Crosstrek (2013, 2014, 2015, 2016, 2017)
  • Subaru STI (2015, 2016, 2017, 2018, 2019, 2020, 2021)
  • Subaru WRX (2016, 2017, 2018, 2019, 2020, 2021)


  • 6061 Billet Aluminum Construction
  • Anodized Black Finish
  • Eliminates Flex at the Firewall
  • Adjustable, Lockable Bolt-on Design
  • Stainless Steel Hardware
  • Improved, Solid Pedal Feedback
  • Much Stiffer and More Durable than Stock
  • Resistant to The Elements
  • Long-Lasting


  • (1) PERRIN Master Cylinder Brace
  • (3) M6 socket cap screw
  • (1) M8 socket cap screw
  • (1) M8 Fender washer
  • (1) M12 Socket set the cup
  • (1) M12 Jam nut
  • (1) M6 Short arm hex key
  • (1) M5 Short arm hex key
  • Warranty & Instructions

To provide faster delivery and turn around time; Kami Speed ships products out from different warehouses throughout the United States. Usually averaging 1-4 business days for processing prior to shipping.

Depending on the package, we ship using different carriers according to the item's location, content, and size.

Freight truck items, will require up to 7 business days to ship due to size. i.e. hoods, trunks, body kits, etc.

All orders made after 3:00pm ET will be shipped or processed the next business day.

Orders over $500 will ship insured and over $1,000 with signature and insurance in order to guarantee delivery. Orders over $1000 may not be able to ship to a different address not listed as the billing address or confirm payment address from the form of payment used. Orders with suite numbers or apartment numbers will require signature if valued over $200.

All international orders outside of the USA are subject to duties and taxes per your countries jurisdiction and determined by customs.
Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.

In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail. All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

Any processed orders that have not shipped will incur a 6% cancelation refund fee unless the product was not available to ship within a timely manner. No fee will be incurred if used as store credit.

For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor 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 your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

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