Stop With Purpose: GrimmSpeed Performance Calipers Are On the Way
When you step on the brake pedal, a lot happens in milliseconds. But one of the most important parts of that chain reaction is the brake caliper. It's the muscle behind the braking system, squeezing your pads onto the rotors and helping bring your car to a stop with power and control. Without a strong and responsive caliper, all the pads and rotors in the world won’t do much.
At GrimmSpeed, we know the value of control — especially in a Subaru. That’s why we’ve developed our very own performance brake calipers, designed specifically for platforms like the VA WRX/STI, VB WRX, and the GR86/BRZ/FR-S twins. These calipers are the result of careful engineering, real-world testing, and a desire to create something that feels as good on the street as it does on the track.
Built for the Chassis That Matter
Our calipers are designed to directly fit:
- 2015–2021 Subaru WRX & STI (VA)
- 2022+ Subaru WRX (VB)
- 2013+ Subaru BRZ / Toyota GR86 / Scion FR-S
Each platform has its own unique setup, so these kits aren’t a one-size-fits-all solution. For example, the GR86 uses a leading caliper design (mounted in front of the axle), which required a mirrored internal configuration to deliver proper fluid flow and pad movement. It’s all about creating a setup that truly belongs on your specific chassis.
What You’ll Find in the Box
Here’s a quick glance at what’s in the works:
- Forged 6061 aluminum caliper bodies, anodized for durability and heat resilience
- 44mm and 41mm pistons for ideal pad contact and consistent pressure
- Bracket kits tailored to rotor size and vehicle fitment (ranging from 315mm to 340mm)
- Pad compatibility (depends on application): Common sizes giving you flexibility to source pads from top brands you trust:
- FMSI D1001 — Used on the STI, Civic Type-R, CTS-V, Evo, etc.
- FMSI D968 - Commonly called the "F40 Pad", this pad size used on many brembo equipped vehicles like the Ferrari F40, Nissan, GT-R, and more
- Weight: approx. 9.9 lbs including bracket and hardware — lighter than STI Brembos
The caliper body is built for strength, but it’s also designed for efficient cooling and long-term wear resistance. You’ll notice thoughtful details throughout the construction — from stainless steel tension springs to electrocoated brackets that resist corrosion.
Why It Matters
We didn’t build these just to replace what’s already out there. We built them to meet the demands of those who drive hard, take pride in their builds, and need a brake system that keeps up. Whether you’re diving into canyon corners or braking late on a time attack lap, these calipers are built to hold pressure, shed heat, and maintain pedal consistency stop after stop.
Final fitments are being dialed in, install guides are underway, and production is on track. These calipers were born from our desire to create a better braking experience for the WRX, STI, and BRZ/GR86 crowd. And once they hit the market, we think you’ll agree they were worth the wait.
