MG6 Big Brake Kit Upgrade / TTSPORT Classic 9040

The MG6 sells itself on being the sporty outlier in its class, especially after the 2020 mid-cycle refresh brought a more aggressive body kit and a sharper interior. Official numbers put its 0-100 km/h time at 6.6 seconds — quick enough to embarrass plenty of rivals. But acceleration is only half the story, and repeated braking tests on this car exposed the other half.

In independent testing by Autohome, dozens of 100 km/h-to-stop runs on this MG6 landed consistently around 39 meters — a soft number for a sedan built around a sporty image. The fix went to the front axle first: a TTSPORT TT9040 six-piston forged caliper kit paired with a larger front rotor, plus a matching rear big-rotor setup. TTSPORT has sold this exact TT9040 combination for years, and it's become one of the brand's more proven, low-comeback options for this kind of build.

Vehicle & Kit Specs

Why It Works

• A forged six-piston caliper is stiffer than a stock single- or dual-piston sliding caliper, so pedal input goes into clamping force instead of flexing metal. Opposed pistons of graduated size apply pressure progressively as pedal load increases, which is what makes the pedal feel more linear instead of grabby or vague.
• The 355x32mm front rotor is both larger in diameter and thicker than the factory disc, giving it more surface area to shed heat and more leverage against the pad — both of which help shorten stopping distance and resist fade under repeated hard stops.
• Stock rubber brake lines expand slightly under sustained high pressure, which can lengthen pedal travel over a hard braking session. TTSPORT's stainless lines add steel-braid reinforcement over the rubber core, keeping line expansion in check so pedal feel stays consistent stop after stop.
• Moving the rear rotor up to 330mm increases the distance between the pad contact patch and the axle centerline, which adds braking torque at the rear and helps balance front-to-rear bias with the upgraded front end.

The TT9040 is a familiar part number to longtime TTSPORT customers and enthusiasts — a forged high-performance caliper valued for its rigidity, even clamp force, and quick response across a range of braking loads. Paired with the drilled, high-carbon heat-treated front rotor, it also runs lighter unsprung weight than a comparable cast setup, which helps suspension response as much as outright stopping power.

Installation Gallery

Beyond the numbers, a red TT9040 caliper and a larger rotor visible through the spokes change how the whole car reads — the front wheel fills out, and the brake hardware looks proportional to the MG6's sport-sedan styling instead of hiding behind it.

FAQ