GAC GS8 Big Brake Kit Upgrade / TTSPORT Classic 8703
The GAC Trumpchi GS8 is a big, heavy seven-seat SUV — a 2.0T turbo four making 148 kW (201 PS) and 300 Nm through a 6-speed automatic, riding on a suspension tuned for comfort. During braking tests, that soft setup showed its downside: noticeable nose-dive and a pronounced forward lean under hard stops. A vehicle this size needs a brake system that can actually control that weight transfer, so the owner went with a front six-piston / rear four-piston TTSPORT dual-caliper setup.
Up front, the stock caliper was swapped for a TTSPORT 8703 cast six-piston caliper matched to a 380×34mm high-carbon, heat-treated drilled rotor. Out back, a TTSPORT 8903 cast four-piston caliper and 380×28mm rotor handle service braking, with a dedicated TTSPORT EPB caliper preserving the factory electronic parking brake. All of it was installed under the GS8's factory 19-inch wheels.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | GAC Trumpchi GS8, 2.0T, 19-inch factory wheels |
| Front caliper | TTSPORT 8703 cast six-piston caliper |
| Front rotor | TT 380×34mm high-carbon, heat-treated drilled rotor |
| Rear caliper | TTSPORT 8903 cast four-piston caliper + TT EPB electronic parking brake caliper (dual-caliper setup) |
| Rear rotor | TT 380×28mm high-carbon, heat-treated drilled rotor |
| Lines / hardware | TT stainless steel brake lines |
Why It Works
- The front 8703 caliper uses a staggered piston layout — smaller and larger pistons across the same caliper body — which pushes the pad against the rotor more evenly. That means a more linear pedal and less uneven pad wear over time.
- Steel pistons in the front caliper hold up to sustained heat better than lighter alloys, which matters when a heavy SUV is repeatedly shedding speed from highway pace.
- The 380mm drilled rotors — 34mm up front, 28mm at the rear — carry more mass and surface area than the stock discs, giving the system more thermal capacity before fade sets in.
- Since the GS8 uses an electronic parking brake, the rear axle can't just run a single big performance caliper. TTSPORT's split-cast EPB caliper sits alongside the TT8903 four-piston unit, keeping the factory parking-brake mechanism fully functional without cutting or rewiring anything.
Installation Gallery
What brake hardware does this Trumpchi GS8 kit use?
How does the kit handle the GS8's electronic parking brake?
What wheel size was this kit installed under?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.