Ford Mustang Big Brake Kit Upgrade / TTSPORT Classic 8703
Ford's Mustang has a wide, aggressive front fascia that makes the factory calipers look almost lost behind the wheel. This case documents a Mustang owner's switch to a TTSPORT TT8703 big brake kit -- a straightforward hardware swap that fills out the wheel and gives the pedal a lot more to work with.
The car runs 19-inch wheels, and the stock caliper and rotor left a lot of empty space in the barrel. The TT8703 kit was chosen specifically to close that gap while stepping up braking hardware -- not just a cosmetic wheel filler.
Vehicle & Kit Specs
Here's the exact hardware that went on this Mustang:
| Item | Specification |
|---|---|
| Vehicle | Ford Mustang, 19-inch wheels |
| Front caliper | TTSPORT TT8703 fixed monobloc six-piston caliper |
| Front rotor | 380x34mm high-carbon heat-treated curved-vane rotor |
| Bracket | Vehicle-specific caliper bracket for the Mustang |
| Pads / lines | TTSPORT noise-free brake pads, stainless steel braided brake lines |
| Hardware | Brembo brake fluid and mounting hardware |
Why It Works
The improvement here comes down to three basic mechanical changes, not marketing:
- A fixed monobloc caliper body flexes less under hard clamping than a stock floating caliper, so pedal travel goes toward squeezing the pads instead of deflecting the caliper.
- The 380x34mm rotor carries more mass and surface area than the factory disc, giving it more thermal capacity before heat soak starts to fade braking power.
- Six pistons across a larger pad spread clamping force more evenly, which is part of why the owner described the pedal as linear -- braking effort now tracks how hard you press.
Up close, the difference is obvious: the TT8703 caliper and 380mm rotor fill the wheel barrel and give the front end a more purposeful look -- a byproduct of the larger rotor and caliper package, not a separate cosmetic add-on.
The owner followed up about two weeks after the install and reported the kit felt worth the money -- not just for looks, but for how linear the pedal feels and how much stronger the car stops compared to stock.
Installation Gallery
What's included in the TTSPORT TT8703 kit for the Ford Mustang?
Does the TT8703 kit fit behind the Mustang's stock 19-inch wheels?
How does the pedal feel after the upgrade compared to the stock Mustang brakes?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.