The Porsche 718 Boxster chassis is capable of incredible things, often punching well above its weight class. However, many owners feel the factory braking system lacks the linear feedback and sheer bite required for confident, high-performance driving.
Issues like inconsistent pedal feel—sometimes too soft, sometimes too grabby—can detract from the driving experience. This owner sought a solution that would provide motorsport-level consistency, optimized brake bias, and a massive reduction in weight.
The Custom "Hybrid" Caliper Upgrade
To solve these issues, we engineered a bespoke setup. We paired the legendary Porsche GT3 6-piston front calipers with a specialized Brembo 4-piston rear system (to retain the electronic parking brake), all anchored by our STOPFLEX Carbon-Ceramic Rotors. This entire package fits within the 20-inch wheels.
- Vehicle: Porsche 718 Boxster (982)
- Front Calipers: Genuine Porsche GT3 6-Piston Calipers
- Front Rotors: STOPFLEX 400mm (15.7 in) Carbon-Ceramic Discs
- Rear Calipers: Brembo 4-Piston Calipers (with EPB integration)
- Rear Rotors: STOPFLEX 390mm (15.4 in) Carbon-Ceramic Discs
- Brake Pads: STOPFLEX High-Performance Ceramic Pads
- Hardware: Custom mounting brackets and bolts
Important: System Compatibility
This case study features a bespoke Big Brake Kit (BBK) conversion using fixed multi-piston calipers (GT3 Front / Brembo Rear). Our STOPFLEX carbon-ceramic rotors are engineered to pair with this specific high-performance hardware.
Please note: These rotors are custom-configured for this caliper setup. They cannot be directly installed with the standard factory 718 floating calipers without a full caliper conversion.
Why This Bespoke System Transforms the 718
- Perfected Pedal Feel: The combination of GT3 6-piston front and Brembo 4-piston rear calipers fundamentally changes the brake pedal characteristics. The modulation becomes linear and predictable, allowing for precise trail-braking into corners without the inconsistent "grab" of the stock system.
- Massive Weight Savings: STOPFLEX carbon-ceramic discs are over 50% lighter than comparable steel rotors. Reducing this unsprung mass sharpens the 718's turn-in response and allows the suspension to settle faster over mid-corner bumps, enhancing the car's legendary balance.
- Fade-Proof Endurance: With 400mm front and 390mm rear rotors, the system has immense thermal capacity. Even under extreme conditions where stock brakes would fade, this setup maintains consistent friction and stopping power.
Installation Gallery
Frequently Asked Questions
Q: Why use a Brembo rear caliper instead of a matching GT3 rear?
A: The 718 uses an electronic parking brake (EPB). While the GT3 rear caliper is excellent, integrating it with the 718's EPB system can be complex. We selected a specialized Brembo 4-piston rear caliper that allows for a seamless EPB integration while providing the clamping force needed to balance the massive front GT3 calipers.
Q: Will this setup fit under 19-inch wheels?
A: Generally, no. A 400mm front rotor paired with a large 6-piston caliper like the GT3 unit requires a 20-inch wheel for safe clearance. Some very specific motorsport 19-inch wheels might fit, but 20-inch is recommended.
Q: Is this system noisy for street use?
A: No. Despite the race-bred hardware, the system is engineered for refined street manners. Our pad compound ensures smooth engagement without the harshness or squealing often associated with track-only brake setups.
