BYD Song Big Brake Kit Upgrade / TTSPORT Classic 5440
A soft, low pedal is the usual complaint that sends BYD Song owners looking for a real brake upgrade. This case swaps the stock front hardware for a TTSPORT Classic 5440 forged four-piston caliper paired with a 330 x 28mm rotor and stainless lines — bolted on behind the factory 17-inch wheel with no spacers.
The owner spec'd a Tiffany-blue finish on the caliper and a matching custom bracket, turning a functional brake job into a visual centerpiece behind the wheel. Underneath the color, the hardware is a straightforward Classic Series big brake kit: forged aluminum caliper body, larger rotor, and fresh stainless lines replacing the factory rubber hose.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | BYD Song, 17-inch factory wheels |
| Front caliper | TTSPORT Classic Series 5440 forged four-piston caliper, custom Tiffany-blue finish |
| Front rotor | TTSPORT 330 x 28mm high-carbon heat-treated two-piece rotor |
| Lines | TTSPORT stainless steel brake lines, front |
The 5440 used on this Song is a Classic Series caliper; its full published specification sheet is below.
| 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 forged two-piece caliper body flexes less under load than a stock sliding caliper, which is what gives the pedal a firmer, more predictable bite point. The larger 330 x 28mm rotor adds swept area and thermal mass, so the system sheds heat faster and resists fade under repeated stops. On this build the geometry lined up cleanly with the factory 17-inch wheel and the stock splash guard, so it went on without spacers or trimming.
- Forged four-piston caliper for a stiffer, more responsive pedal
- 330 x 28mm two-piece rotor adds mass and heat capacity over the stock disc
- Clears the factory 17-inch wheel and fender liner with no spacers
The owner also reported noticeably less brake dust building up on the rotor face after the swap, along with a firmer pedal and quicker response — a small but telling sign the new pad and rotor combination is running cleaner under normal driving.
Installation Gallery
Does the TTSPORT 5440 kit fit the BYD Song's stock 17-inch wheels?
What's included in this BYD Song brake upgrade?
Can the TT5440 caliper be ordered in a custom color?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.