BMW 3 Series (325) Big Brake Kit Upgrade / TTSPORT Classic 5410
The BMW 3 Series still carries some of its sporting DNA, and the 325 in particular can deliver a solid driving experience once the power and suspension are dialed in. But the factory brakes are a common complaint on the newer 3 Series — a long, vague pedal and soft response that doesn't match how the rest of the car drives. This 325 got a TTSPORT TT5410 big brake kit to fix exactly that.
The upgrade centers on the TT5410, a forged four-piston caliper built from 6082 high-strength aluminum. A single caliper weighs roughly 3.18 kg, which keeps unsprung mass in check compared to a heavier factory setup — less rotating mass at the corner means quicker suspension response and a more direct feel through the wheel. The kit requires 18-inch wheels or larger and pairs with a 355x32mm rotor.
Vehicle & Kit Specs
| Item | Specification |
|---|---|
| Vehicle | BMW 3 Series (325), 18-inch wheels or larger |
| Front caliper | TTSPORT TT5410 forged four-piston caliper, 6082 aluminum, ~3.18 kg |
| Front rotor | 355x32mm directional vented, slotted, high-carbon heat-treated rotor |
| Bracket | Vehicle-specific caliper bracket matching factory bolt pattern |
| Lines | TTSPORT stainless steel braided brake lines |
Why It Works
A forged four-piston caliper clamps more evenly across the pad than the factory floating unit, which is what firms up pedal feel — less flex in the caliper body means the pressure you put in at the pedal translates more directly into clamping force at the rotor. Stepping up to a 355x32mm directional vented, slotted rotor adds surface area and thermal mass, so the brakes shed heat faster and resist fade under repeated hard stops.
- Vehicle-specific bracket lines up with the factory mounting points — direct bolt-on, no spacers
- 355x32mm rotor size fits behind 18-inch wheels with the correct offset
- Forged 6082 aluminum caliper keeps unsprung weight down versus a heavier factory unit
Installation Gallery
FAQ
What wheel size does the TT5410 kit require on a BMW 325?
What's included in the TTSPORT TT5410 kit for the 325?
Does the caliper bracket require any modification to install?
Need fitment confirmation? Choose the closest TTSPORT series or send your vehicle, wheel size, and intended use before ordering.