BMW 5 Series (G30) Big Brake Kit Upgrade / TTSPORT Evolution ES6
A BMW 5 Series (G30) owner wasn't happy with the factory brake pedal — soft, vague, and short on the kind of linear response you want when you're actually leaning on the brakes. Working with TTSPORT's dealer in Malaysia, the fix was a front-to-rear brake overhaul built around the TTSPORT Evolution Series ES6 six-piston caliper.
The car keeps its stock 19-inch wheels. Up front, the ES6 six-piston caliper clamps a 380mm high-carbon heat-treated rotor; out back, a 370mm high-carbon heat-treated rotor takes over from the factory disc. The rest of the kit is what you'd expect from a proper big brake swap: a vehicle-specific caliper bracket, TTSPORT street-compound pads, stainless steel lines, brake fluid, and the mounting hardware to put it all together.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | BMW 5 Series (G30), 19-inch factory wheels |
| Front caliper | TTSPORT Evolution Series ES6, two-piece forged six-piston |
| Front rotor | TTSPORT 380mm high-carbon heat-treated rotor |
| Rear rotor | TTSPORT 370mm high-carbon heat-treated rotor |
| Bracket | Custom vehicle-specific caliper bracket |
| Pads / lines | TTSPORT high-performance street pads, TTSPORT stainless steel brake lines |
| Hardware | Brake fluid, mounting bolts, and fasteners |
Below is the official TTSPORT spec sheet for the ES6 caliper used on this build.
| Brake Caliper | |
|---|---|
| Series | Evolution Series |
| Model / Application | ES6 |
| Axle Position | Front |
| Piston Count | 6-piston |
| Piston Type | Two-piece heat-insulated pistons with dust boots |
| Piston Diameter | 27 mm × 2 / 32 mm × 2 / 38 mm × 2 |
| Caliper Dimensions | L 294 mm × W 155 mm × H 84 mm |
| Total Piston Area | 50.2 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 3.95 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 18 in or larger |
| Recommended Rotor Size | Ø355–380 mm × 32 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 99 |
| Caliper Mounting Type | Radial mount with vehicle-specific caliper brackets |
| Brake Line Fitting Type | Vehicle-specific fittings; caliper-side and chassis-side fittings vary by application |
Why It Works
The ES6's two-piece forged body adds a through-bolt reinforcement bar that ties the caliper halves together, cutting flex under hard braking. A stiffer caliper means less pedal travel gets absorbed by the hardware itself, which is where a lot of that "mushy" stock feel comes from in the first place. Inside, the two-piece heat-insulated pistons with dust boots and optimized seals distribute clamping force more evenly across the pad, so braking stays consistent whether you're on a long downhill or working the brakes hard on track.
On the rear axle, the larger 370mm high-carbon heat-treated rotor does two jobs at once:
- More rotor diameter means more leverage for the pads to work against, which translates to stronger, more stable braking and better grip through corners as the car settles onto the rotor.
- A bigger disc also means more surface area to shed heat, which keeps temperatures down and helps stave off the fade that shows up after repeated hard stops.
Tip from TTSPORT: the ES6 caliper is designed to run either a 355mm or 380mm high-carbon heat-treated rotor, so the front rotor size can be matched to the wheel diameter on a given car.
Installation Gallery
Frequently Asked Questions
What TTSPORT kit was installed on this BMW G30 5 Series?
What wheel size does this kit fit behind?
Can the ES6 caliper run a smaller front rotor?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.