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The CMST BMW 5 Series carbon-fibre kit is a six-piece aero set for the G30/G38 generation (2017–2023), built from carbon fibre to add sporting presence to a car styled for the boardroom. It comprises a front lip, a two-piece front-bumper vent set, two-piece side skirts and a rear lip, all moulded from the factory M Sport surfaces and bolting to OEM mounting points. The parts lower the visual ride height, sharpen the front and rear, and trim weight over the painted plastic originals without touching the body or the M550i's drivetrain underneath.

• Vehicle: BMW 5 Series G30 (standard wheelbase) and G38 (long wheelbase), 2017–2023, M Sport and M550i
• Material: carbon fibre, gloss-lacquered 2x2 twill weave
• Six-piece set: front lip, front-bumper vents (2 pieces), side skirts (2 pieces), rear lip
• Function: reduced front-end lift, lower stance, cleaner airflow along the flanks and off the tail
• Finish: exposed carbon weave or paint-matched to body colour

A business saloon with a sporting edge

The G30/G38 5 Series is BMW's executive saloon — composed, comfortable and, in M Sport or M550i trim, genuinely quick. What it is not, in standard form, is loud about it. CMST's carbon set is aimed precisely at that gap: it adds restrained but real aggression to a car whose lines are otherwise smooth, so an M550i looks as purposeful as it drives. Because it is a six-piece bolt-on rather than a bumper-replacement kit, it suits an owner who wants to lift the look of a daily-driven executive car without committing to a full conversion.

Piece-by-piece breakdown

Carbon front lip

The front lip is the set's anchor. It extends the lower edge of the M Sport bumper, sharpening the nose and lowering the visual ride height while helping reduce front-end lift at speed by tidying the airflow under the leading edge. On a long, heavy saloon, that cleaner front aero is a worthwhile by-product of a part most owners fit for the look. It bolts to the factory bumper's lower fixings.

Front-bumper vents (two pieces)

The two carbon bumper-vent inserts replace the factory corner trims, adding texture and line to the lower bumper. They break up the broad front fascia of the 5 Series and tie visually into the front lip, giving the car's face more depth. As carbon parts they are light and take a clear-coat or body-colour finish.

Side skirts (two pieces)

The two-piece carbon side skirts run the lower edge of the doors, drawing a low, taut line down the flanks. On a car as long as the G38 they are important for proportion — they stop the profile looking tall over the wheels and connect the front lip to the rear, so the saloon reads lower and more athletic from the side. They add the kind of sporting detail BMW reserves for its M cars.

Carbon rear lip

At the tail, the carbon rear lip finishes the set, adding shape and a touch of attitude to the rear bumper and tidying airflow as it leaves the back of the car. Combined with the front lip and skirts, it ensures the carbon theme runs front to rear rather than stopping at the nose, so the modified 5 Series looks deliberate from every angle.

Why carbon on the 5 Series

The 5 Series is a refined car, and carbon suits it for two reasons. First, restraint: a six-piece carbon set adds sporting intent without the visual shouting of a wide-body, which fits the executive context. Second, material honesty — exposed carbon reads as a genuine performance upgrade rather than a plastic add-on, and it pairs naturally with the M550i's quad exhaust and M Sport details. The weight saving over painted plastic is modest on a car this size, so here carbon is chosen mainly for finish and cohesion rather than lap times.

Fitment and finish in Australia

The six-piece set is a straightforward bolt-on, but even gaps make the difference between a factory look and an aftermarket one, so dry-fit each panel before final fitment — professional installation is the safe route, especially for aligning the front lip to the bumper. Australian UV is hard on lacquer; protect the weave with a ceramic coating or paint-protection film to keep the gloss, and the same coating helps the surrounding paint. Parts ship clear-coated and can be sprayed to body colour for a subtler result.

Browse the range in our CMST Body Kit for BMW collection, find lips for other models under CMST Front Lip for BMW, explore wider options in BMW Body Kit, and read about the brand on the CMST page.

FAQ

Which 5 Series does this kit fit?

It is designed for the G30 (standard wheelbase) and G38 (long wheelbase) BMW 5 Series, 2017–2023, in M Sport and M550i trim. It is built for cars with the M Sport bumpers; confirm your bumper style and wheelbase when ordering so the lip and skirts fit correctly.

Does it fit non-M Sport 5 Series models?

The kit is moulded for the M Sport bumpers, which differ from the SE/Luxury bumpers. If your car has the standard (non-M Sport) bumpers, the parts may not fit without changing to M Sport bumpers first — check your bumper style before ordering.

Is the carbon kit functional or just cosmetic?

Primarily cosmetic, with minor aero benefit. The front lip helps reduce front-end lift and the rear lip tidies airflow off the tail, but on a saloon this size the main reason to fit the set is the sharper, lower look and the cohesion of carbon front to rear.

Can the parts be painted to match my car?

Yes. The carbon panels accept primer and paint, so you can run exposed gloss weave or have them sprayed in your body colour. Many owners leave the lip, vents, skirts and rear lip in clear-coated carbon for contrast against darker paint.

Will the front lip clear speed bumps and driveways?

The lip lowers the nose only modestly, in keeping with the executive remit of the car, so clearance remains reasonable. As with any front lip, approach steep driveways and speed bumps at an angle to be safe.

Want to add carbon presence to your 5 Series? Explore fitment and finishes in our CMST Body Kit for BMW range and talk to the AME Motorsport team about specifying the six-piece set for your car.