The Toyota GR Supra (A90) is JDM royalty reborn. With its BMW-sourced B58 engine and rigid chassis, it punches well above its weight. However, for owners who chase lap times, the factory 4-piston brakes quickly reveal themselves as the weak link—prone to overheating and fading under sustained load. This owner skipped "adequate" and went straight for "legendary," pairing the holy-grail Brembo GT-R nickel-plated calipers with StopFlex Carbon-Ceramic rotors.
The Struggle
While the Supra is a potent sports car, its braking system holds back its true potential on track:
- Thermal Fade: The factory iron rotors struggle to dissipate the immense heat generated by the 3,400lb chassis, leading to a soft pedal after just a few hot laps.
- Unsprung Mass: Heavy iron rotors dull the steering feedback and slow down suspension reaction, masking the Supra's inherent agility.
- Aesthetics: For a car with such aggressive styling, the standard brakes look understated and produce copious amounts of dust.
Technical Specification
This build features a bespoke front-axle upgrade designed to maximize thermal capacity and minimize weight, fitting perfectly inside high-performance 19-inch wheels.
| Vehicle | Toyota GR Supra (A90 / A91) |
|---|---|
| Front Calipers | Brembo GT-R 6-Piston Billet (Nickel Plated) |
| Front Rotors | StopFlex C/SiC (380 x 34 mm / 15.0 in) |
| Weight Saving | ≈ 45% Reduction vs. Iron |
| Pad Material | StopFlex Track & Street Compound |
Compatibility Redline
This is a Custom Big Brake Kit (BBK) application. The StopFlex 380mm Carbon-Ceramic rotors are engineered to pair specifically with the Brembo GT-R calipers using custom mounting brackets. If you wish to retain your factory red 4-piston calipers, we offer a separate direct-fit OE replacement kit.
Engineering Validation
1. Motorsport-Grade Thermal Management
The Brembo GT-R caliper is a masterpiece of rigidity and heat rejection. By pairing it with StopFlex carbon-ceramic rotors, we create a system with virtually infinite thermal headroom. This eliminates brake fade entirely, allowing you to attack braking zones deep and late, lap after lap, without managing temperatures.
2. Transformative Agility
The A90 Supra is highly sensitive to unsprung weight. Our carbon-ceramic discs are over 40% lighter than comparable iron rotors. This reduction allows the suspension to settle faster over curbing and bumps, while significantly sharpening turn-in response and steering feedback.
3. 3D Continuous Long-Fiber Architecture
StopFlex utilizes a 3D Continuous Long-Fiber skeleton with a density of 1.6 g/cm³. This advanced construction ensures the rotors can withstand the extreme clamping forces of the 6-piston GT-R calipers without micro-fracturing, delivering race-car performance with street-car durability.
4. The Ultimate Flex
Beyond performance, this setup is an aesthetic triumph. The nickel-plated billet calipers paired with the exotic weave of the carbon-ceramic rotors create a visual statement that rivals hypercars. Plus, the virtually no-dust operation keeps your show-worthy wheels pristine.
Installation Gallery
In-Depth Supra A90 FAQ
Q: Why pair STOPFLEX rotors with Brembo GT-R calipers?
The Brembo GT-R is widely considered the "ceiling" of aftermarket calipers—rigid, lightweight, and finished in nickel plating for heat rejection. Pairing it with our carbon-ceramic rotors creates a system that maximizes both clamping force and thermal endurance. It is the ultimate "spare no expense" combination for track dominance.
Q: Can I fit this 380mm kit under 19-inch wheels?
Yes. The 380mm (15.0 in) rotor size is specifically chosen to maintain compatibility with many high-performance 19-inch track wheels (like TE37s or Advan GTs), offering a perfect balance of thermal mass and barrel clearance.
Q: Is this system suitable for daily driving?
Yes. While the hardware is race-bred, our StopFlex street compound pads ensure the system has excellent cold bite and operates smoothly on the street without the noise usually associated with race brakes. The added benefit of virtually no brake dust makes it much cleaner than the factory setup.
Q: Do I need to upgrade the rear brakes too?
While a front upgrade handles 70-80% of the braking load, we recommend a matching rear upgrade for aesthetic balance and optimal bias. We offer direct-fit rear rotors that work with the factory electronic parking brake caliper.
Q: What is the lifespan of these rotors?
For a mixed-use Supra (street + track days), StopFlex long-fiber rotors typically last 3-4 times longer than iron equivalents. On the street, they are effectively a "lifetime" component, easily exceeding 250,000 km while remaining rust-free.
