Changan UNI-V Big Brake Kit Upgrade / TTSPORT Slim SL6
The Changan UNI-V built its reputation on a fastback profile, a hatchback layout, and punchy 1.5T/2.0T power — a tight chassis with real sport-oriented tuning that's given owners plenty of room to modify. But the stock brake calibration leans toward comfort: a soft pedal and longer travel that require a bit of mental preparation when you're hauling down from highway speed. That gap between how the car handles and how it stops is why a brake upgrade has become a common first move for UNI-V owners, and this build documents one such install — a TTSPORT SL6 big brake kit that bolts on without touching the factory wheels.
The SL6 was picked specifically because it's a big six-piston caliper that clears roughly 90% of factory wheel setups. No wheel swap, no flange spacers, no fighting with offset — it's a direct install that keeps upgrade costs down while still delivering a genuine six-piston brake.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | Changan UNI-V, factory 18-inch wheels |
| Front caliper | TTSPORT SL6 forged six-piston caliper |
| Front rotor | TTSPORT 345mm wave-pattern rotor |
| Bracket | Vehicle-specific caliper bracket |
| Pads / lines | TTSPORT high-performance pads, stainless steel brake lines |
| Hardware | Brake fluid, mounting bolts, and installation hardware |
The caliper installed on this UNI-V is the TTSPORT SL6 from the Slim Series, built specifically to fit within tighter factory wheel spokes. Here's the full spec sheet for that caliper:
| Brake Caliper | |
|---|---|
| Series | Slim Series |
| Model / Application | SL6 |
| Axle Position | Front |
| Piston Count | 6-piston |
| Piston Type | One-piece heat-insulated pistons |
| Piston Diameter | 28 mm × 2 / 30 mm × 2 / 36 mm × 2 |
| Caliper Dimensions | L 350 mm × W 135 mm × H 120 mm |
| Total Piston Area | 46.8 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 3.60 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 17 in or larger |
| Recommended Rotor Size | Ø330–355 mm × 28 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 82 |
| 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 |
The kit ships as a complete front axle setup: the SL6 caliper, a 345mm rotor, a car-specific caliper bracket, high-performance pads, stainless brake lines, and the fluid, bolts, and hardware needed to bolt it all on without improvising parts.
Why It Works
- Two-piece forged aluminum caliper body with reinforcement ribs — lighter and stiffer than a cast caliper, so the caliper flexes less under hard braking and pedal effort converts more directly into clamping force.
- Progressive six-piston bite — soft off the top for easy city driving, then noticeably firmer as pedal travel increases, giving more confidence on a hard highway stop.
- Two-piece pistons with heat-resistant seals reduce heat transfer into the brake fluid, helping limit fade during repeated hard stops on a mountain road.
- Fits the UNI-V's stock 17–18 inch wheels — the 350mm × 135mm × 120mm caliper is sized to clear factory spokes with no spacers or offset changes required.
Installation Gallery
FAQ
Does the TTSPORT SL6 kit fit the Changan UNI-V's factory 18-inch wheels?
What's included in the TTSPORT SL6 big brake kit for the UNI-V?
Why does the SL6 caliper improve pedal feel over the UNI-V's stock brakes?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.