R55 Performance's 24-Hour Carbon Makeover of a G90 BMW M5

The 2025 BMW M5 G90 gets a dramatic carbon fiber transformation, a lower stance, gloss-black wheels, and a sharper street presence in 24 hours.

In London, R55 Performance met a 2025 BMW M5 G90 that looked almost too quiet for its own good. The car arrived under a cover, finished in Carbon Black with a blue metallic shimmer, and wore Silverstone and black leather inside. Its standard 951M dual-spoke wheels were clean, honest, and completely stock. The crew had one day to turn it into something louder, lower, and meaner. No pressure, right? ...

The team had traveled north to collect the car, still unsure of the exact spec. When the cover came off, the G90 revealed itself as a sharp but restrained machine. It was a 2025 model, and the Carbon Black paint gave it a subtle blue glow under the shop lights. The Silverstone and black leather cabin added a little luxury to a sedan that was about to get a serious attitude adjustment. As of 2026, the G90 M5 remains the current M5 sedan, and this 2025 build still stands as a crisp reminder of how quickly an aftermarket crew can rewrite a car's personality.

A Heavyweight With a Hybrid Heart

The G90 M5 is no lightweight. It carries a twin-turbo 4.4-liter plug-in-hybrid V8 that produces 717 horsepower, and it can launch its 5,390-lb body to 60 mph in 3.4 seconds. That is a strange and wonderful mix of old-school muscle and new-school electric assistance. The M5 rolled onto the lift like a heavyweight boxer stepping into the ring: big, composed, and fully aware of its own strength.

Spec	Detail
Engine	Twin-turbo 4.4-liter plug-in-hybrid V8
Power	717 hp
0-60 mph	3.4 seconds
Curb weight	5,390 lb
Starting look	Carbon Black, Silverstone and black leather, 951M wheels

The 24-Hour Sprint

Once the M5 reached the London shop, the crew hoisted it up and got to work. First, the wheels were sent out overnight to be painted fully in gloss black. That one change alone shifted the car's mood from polished executive to dark street fighter. Then came a set of prototype AST springs, which lowered the front by 38 mm and the rear by 28 mm. Wheel spacers joined the party, pushing the stance out just enough to make the M5 look planted without looking clumsy.

The carbon fiber pieces waited on the shop floor like stage costumes before a big performance. MHC LDN supplied a performance-style carbon kit that included a front splitter, mirror caps, side skirts, and a rear diffuser. The diffuser required new carbon exhaust tips, which gave the rear end a more aggressive finish. The headlights were tinted, and the whole car was polished and waxed before the photo session. The crew did not just talk a big game; they built the look in a single day.

From Quiet to Mean

When the work was done, the G90 looked wider, lower, and far more serious. The gloss black wheels disappeared into the arches, the carbon add-ons gave the body a sharper edge, and the tinted headlights added a sly, focused glare. The car seemed to grin when the rear diffuser went on ... and honestly, it had earned that grin.

The result was mean enough to make a traffic cone think twice. Yet it was still an M5, still a hybrid heavyweight, and still capable of calm cruising when the driver wanted it. That balance is what makes the build interesting. R55 Performance did not simply bolt on parts; the team changed the car's posture, its presence, and its attitude in 24 hours.

Why This Build Still Matters in 2026

By 2026, the aftermarket world has seen plenty of G90 M5 projects, but this one remains a neat example of focused speed. It shows how a few well-chosen changes can transform a controversial design into a cohesive machine. The Carbon Black paint, the Silverstone cabin, the gloss black wheels, and the MHC LDN carbon kit all work together without fighting for attention. The AST drop and spacers give the car a stance that feels intentional, not overcooked.

For fans of the G90, the lesson is simple: this M5 may be heavy, hybrid, and complicated, but it is also a canvas. R55 Performance proved that a 24-hour sprint can produce a car that looks ready for a magazine cover and a midnight run. The transformation video diary captured the rush, the small setbacks, and the final reveal, but the real story is in the car itself. It arrived as a quiet Carbon Black sedan and left as a low, carbon-trimmed statement ... with a hybrid V8 heart still beating underneath.