GAC Yingbao Big Brake Kit Upgrade / TTSPORT Classic 5440
Factory brake systems are tuned for everyday driving, not repeated hard stops — pad area and clamping force are kept modest to save cost and weight. This case looks at a GAC Trumpchi Yingbao that had its front brakes swapped for a TTSPORT Classic 5440 big brake kit, a forged four-piston caliper built to add pedal feel and stopping margin without any oddball fitment work.
The 5440 is a two-piece forged aluminum caliper from TTSPORT's Classic Series, using four star-profile racing pistons (38mm x2 / 41mm x2) with no dust boots — a layout aimed at bolt-on upgrades where consistent clamping and heat tolerance matter more than luxury sealing.
Vehicle & Kit Specs
The table below summarizes what went on the car; the full manufacturer spec sheet for the 5440 caliper follows it.
| Item | Specification |
|---|---|
| Vehicle | GAC Trumpchi Yingbao |
| Front caliper | TTSPORT Classic 5440, forged 4-piston |
| Front rotor | Recommended Ø330-345mm x 28mm (per 5440 spec sheet) |
| Pads | TTSPORT brake pads sized for the 5440 caliper |
| Fluid / hardware | TTSPORT brake fluid and caliper mounting hardware |
| Brake Caliper | |
|---|---|
| Series | Classic Series |
| Model / Application | 5440 |
| Axle Position | Front |
| Piston Count | 4-piston |
| Piston Type | Star-profile racing pistons without dust boots |
| Piston Diameter | 38 mm × 2 / 41 mm × 2 |
| Caliper Dimensions | L 276 mm × W 138 mm × H 80 mm |
| Total Piston Area | 49.1 cm² per caliper, all pistons combined |
| Manufacturing Process | Two-piece forged aluminum body |
| Net Weight | 2.65 kg per caliper, without pads |
| Surface Finish | High-temperature gloss coating |
| Recommended Wheel Size | 17 in or larger |
| Recommended Rotor Size | Ø330–345 mm × 28 mm |
| Fitment & Installation | |
| Minimum Spoke Clearance (mm) | 86 |
| 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
- A two-piece forged aluminum body flexes less than a cast caliper under load, so pedal input translates more directly into clamping force instead of getting absorbed by caliper deflection.
- Four pistons (38mm/41mm) spread clamping force across a larger pad area than a typical single- or twin-piston factory caliper, which helps even pad wear and resists uneven pad taper over time.
- The 5440 is designed to clear 17-inch and larger wheels with a matching vehicle-specific bracket, so the swap follows the factory mounting geometry rather than needing custom spacers.
FAQ
What vehicle is this TTSPORT 5440 kit installed on?
What does the TTSPORT 5440 kit include?
What wheel size does the TTSPORT 5440 caliper need?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.