BMW X5 Big Brake Kit Upgrade / TTSPORT Classic 8703
The BMW X5's 3.0T engine moves close to two tons of SUV with real authority — plant the throttle in Sport or Comfort mode and the pull just keeps coming. A chassis that eager needs brakes that can match it, and that's exactly what this X5 owner set out to fix with a full front-and-rear TTSPORT big brake kit.
The build went with a standard front-six, rear-four setup: TT8703 six-piston forged calipers up front and TT8901 four-piston forged calipers out back, both finished in red and matched to custom red caliper brackets. Everything was sized to clear the car's 20-inch wheels with no spacers.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | BMW X5, 20-inch wheels |
| Front caliper | TTSPORT TT8703 six-piston forged caliper |
| Front rotor | TTSPORT TT405, 405mm x 34mm drilled rotor |
| Rear caliper | TTSPORT TT8901 four-piston forged caliper |
| Rear rotor | TTSPORT TT380, 380mm x 28mm drilled rotor |
| Bracket | Custom red-anodized caliper brackets, front and rear |
Why It Works
A six-piston front caliper spreads clamping force across more pad area than a stock caliper, which helps the pedal feel firmer and more predictable under hard braking. The larger 405mm front rotor and 380mm rear rotor add mass and surface area, giving the system more heat capacity so braking stays consistent instead of fading on repeated stops. The drilled rotor faces are there to help move that heat away from the friction surface.
- Front six-piston / rear four-piston forged calipers for stronger, more even clamping force
- 405mm front / 380mm rear drilled rotors add heat capacity and aid cooling
- Fits behind the car's factory 20-inch wheels, no spacers required
Installation Gallery
FAQ
What wheel size does this TTSPORT big brake kit fit on the BMW X5?
What's included in the front and rear kit?
Why use drilled rotors on this build?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.