Audi A3 Big Brake Kit Upgrade / TTSPORT Classic 8703

The new Audi A3 picked up a sharper family look and a 1.4T turbo four under the hood, but the factory brakes still leave the pedal feeling soft when you actually lean on them. This build swaps in a TTSPORT TT8703 six-piston big brake kit up front, fitted behind the car's stock 18-inch wheels with no spacers required.

The install centers on three pieces: the TT8703 cast monobloc six-piston caliper, a 355x32mm curved high-carbon heat-treated rotor, and stainless steel brake lines. Nothing exotic — just a proven big-brake formula sized to bolt in under the A3's existing wheel package.

Vehicle & Kit Specs

The caliper body is a single-piece cast aluminum alloy unit rather than a bolted-together housing, which keeps the caliper from flexing or expanding outward under hard, repeated stops — flex is what eats pedal feel and lets stopping power fade away over a long descent or track session.

Why It Works

• Six opposed pistons spread clamp force more evenly across the pad, so light-to-moderate pedal input stays controllable instead of grabbing — you get a caliper that's easy to modulate rather than one that locks up on a light tap.
• The curved rotor design continuously sweeps dust off the pad surface and adds surface area for heat dissipation, which helps limit fade during repeated hard braking.
• The 355mm rotor size was chosen specifically to package behind the A3's 18-inch wheels, so the kit fits without spacers or wheel changes.
• A rust-inhibiting coating on the rotor face protects the areas the pad doesn't sweep, keeping the rotor looking clean rather than developing a rusty ring over time.

Installation Gallery

After the install, the test drive showed a noticeably firmer pedal and better control at the top of the brake stroke — the kind of confidence that matters whether the car is running errands around town or being pushed harder on a back road.

FAQ