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This Sao Paulo Yellow BMW M4 Competition (G82) wears a full CMST dry-carbon aero kit: a two-piece front lip, four front canards, a vacuum-formed carbon bonnet, carbon side skirts, carbon front fenders, a three-piece rear lip with corners, and a fixed carbon rear wing. Every exterior panel here is dry carbon fibre (autoclave-cured pre-preg), so the kit adds genuine aero hardware rather than a styling wrap. It is shaped specifically for the 2021-onward G8x M4, which makes it a bolt-on match for the factory bumpers, bonnet and boot lid.

• Vehicle: BMW M4 Competition (G82/G83), 3.0-litre twin-turbo S58 inline-six, ~503 hp / 650 Nm
• Fitment years: 2021 onward (G8x M3/M4)
• Material: Dry carbon fibre throughout (pre-preg, autoclave-cured)
• Key pieces: 2-piece front lip, 4-piece canards, carbon bonnet, side skirts, front fenders, 3-piece rear lip with corners, fixed rear wing
• Finish: Gloss 2x2 twill weave under clearcoat; bonnet offered in clear (transparent weave) or solid (non-transparent) finish

The build: a G82 M4 Competition in full carbon

The base car is a G82 M4 Competition, the coupe version of BMW's current M3/M4 generation launched in 2021. Power comes from the S58, a 3.0-litre twin-turbo inline-six producing roughly 503 hp and 650 Nm. In Competition xDrive form the M4 reaches 100 km/h in about 3.9 seconds and is capped at 250 km/h. It already ships with serious hardware: an eight-speed M Steptronic transmission, adaptive M suspension, M xDrive all-wheel drive, an optional M carbon-ceramic brake package and an M Sport exhaust. The goal of this build was to give the bodywork the same intent as the running gear.

The owner took a single-material route. Every panel in this kit is dry carbon fibre, so the weave reads consistently from the front splitter to the rear wing. The car keeps its OEM silhouette and bolts the carbon aero straight onto the standard body, which is why it reads as a coherent build rather than a parts-bin collection. If you are scoping a similar project, AME stocks the full CMST catalogue alongside the wider BMW body kit range.

Full parts list

This is the complete CMST kit fitted to the car, all in dry carbon fibre. Each line is its own component, so the build can be staged over time.

• Front lip (2-piece): a splitter-style carbon lip that extends the leading edge below the factory M4 bumper.
• Front canards (4-piece): two air-blade canards per side, on the front bumper corners.
• Carbon bonnet: a vacuum-formed dry-carbon replacement for the steel bonnet, with vents.
• Side skirts: carbon skirt extensions that lower the visual ride height along the flanks.
• Front fenders: carbon guards that replace the OEM front wings.
• Rear lip with corners (3-piece): a lower apron blade plus two corner sections that frame the rear bumper.
• Rear wing: a fixed carbon wing that replaces the standard boot spoiler.

Browse equivalents through AME's BMW-specific collections: the CMST front lip for BMW, the CMST carbon bonnet for BMW, and the CMST spoiler and wing range for BMW.

Front end: lip and canards

The wide twin-kidney grille of the G8x M4 is a large, upright front face, which gives a splitter and canard set a clear job to do. The two-piece front lip drops the leading edge of the bumper and reduces the air slipping under the nose, while the four canards sit on the bumper corners and shed small vortices into the airflow down each flank. The combined effect is less front-axle lift as speed builds, so the steering stays consistent on a fast road or motorway on-ramp instead of going light. The carbon lip also sharpens the M4's already aggressive front.

Carbon bonnet: weight where it counts

Swapping the steel bonnet for dry carbon removes mass from the highest, most forward point of the car, which is the best place to lose weight for turn-in and front-end response. The vents also help extract hot air from the engine bay. This is the one panel where CMST offers a finish choice: a transparent (clear) weave that shows the carbon under a glossy clearcoat, and a solid, non-transparent finish that reads darker and uniform. The clear weave suits a bright colour like Sao Paulo Yellow; the solid finish is subtler on a darker car. Either way, confirm the latch and any safety pins engage correctly before driving.

Sides: skirts and carbon fenders

Along the flanks, the carbon side skirts extend the rocker line and visually pull the car towards the road, tidying airflow between the wheels. The carbon front fenders replace the factory guards and keep the single-material theme running through the middle of the car. On a yellow car the gloss-black weave along the sills draws a clean horizontal line that makes the M4 look longer and lower — the styling payoff of a skirt set beyond its aero role.

Rear: lip with corners and a fixed wing

The three-piece rear lip wraps the lower bumper with a central blade and two corner pieces, framing the M4's quad exhaust and giving the tail a planted, diffuser-style stance. The split construction is practical: it fits around the existing bumper and ships in smaller, less fragile sections. Above it, the fixed rear wing replaces the OEM boot spoiler entirely.

A fixed wing behaves differently from the factory ducktail-style spoiler. It sits up in cleaner, faster-moving air above the boot lid to generate measurable rear downforce, which is most useful at higher speeds where it improves stability and balances the front lip and canards so the rear does not feel nervous. The trade-off is a bolder look and a small rise in drag. For a car already running serious front aero, the fixed wing keeps the front-to-rear balance honest.

Before and after: how the kit changes the car

Standing back, the difference is in proportion rather than decoration. The factory M4 Competition looks purposeful but visually tall around the bumpers; the CMST kit lowers every visual reference point. The front lip and canards add depth to the nose, the skirts stretch the side profile, and the fixed wing gives the tail a clear aero signature. Because the panels are all dry carbon, the gloss weave ties the splitter, bonnet, skirts and wing into one design language rather than separate add-ons.

The white-background layout below shows the full set as supplied: lip, vented bonnet, skirts, fenders, canards, rear lip and wing. Seeing the parts together makes the single-material logic obvious — one coordinated kit, not a shelf of unrelated pieces.

Owner-style takeaways

A few honest notes for anyone weighing up the same build:

• Commit to one material. Going all dry carbon is what makes this car look resolved; the consistent weave is a big part of the result.
• Pick the bonnet finish deliberately. The clear weave is the showpiece on a bright car; the solid finish is the quieter choice. They read very differently in daylight, so decide before you order.
• Budget for clearcoat care. Dry-carbon clearcoat is UV-sensitive. Garaging the car, washing with pH-neutral products and adding a UV-stable ceramic coating or PPF keeps the weave from yellowing.
• Use a workshop. Carbon panels are made to tighter, more brittle tolerances than the flexible factory plastic, so trial-fitting and secure mounting are a fitter's job, not a driveway one.

Fitment and finish in Australia

Because the kit is shaped for the 2021-onward G8x M4, the panels follow the factory body lines and mount to the existing bumpers, bonnet and boot. That still means a proper fit-up: trial-fitting each piece, setting panel gaps against the adjacent OEM panels, and securing the parts with the right mix of clips, bolts and panel-safe adhesive. Protect leading edges that catch stone chips with a clearcoat check or PPF.

Anything that changes ride height or external dimensions should be fitted with roadworthiness in mind, so keep the build sensible for road use. AME can supply the CMST pieces and advise on staging the work; the full range sits in the CMST carbon fibre body kit and CMST body kit for BMW collections.

Frequently asked questions

Does the CMST M4 kit fit my car?

The kit is designed for the BMW M4 (G82 coupe and G83 convertible) and the related M3 (G80) from the 2021 model year onward. It is shaped to the G8x body, so confirm your car is a 2021-or-later G8x M3/M4 before ordering. It is not designed for the previous F82/F80 generation.

Is the kit dry carbon or wet carbon?

Every panel in this kit is dry carbon fibre — pre-preg carbon cured under heat and pressure in an autoclave. Dry carbon is lighter and stiffer than wet-layup carbon and carries a crisp 2x2 twill weave under clearcoat. The CMST part codes for this M4 set (CMS1/CMS2-34x series) are all specified as dry carbon.

What is the difference between the transparent and non-transparent bonnet?

The transparent (clear) bonnet shows the carbon weave through a glossy clearcoat, so the twill pattern is visible in daylight. The non-transparent finish is a solid, darker, more uniform look that hides the weave detail. Both are dry carbon; the choice is purely about appearance. The clear weave stands out on a bright colour, while the solid finish is the subtler option on a darker car.

Will the front lip and wing add real downforce?

They manage airflow rather than transform the car. The front lip and four canards reduce front-axle lift and add a measure of front downforce, while the fixed rear wing generates rear downforce in cleaner air above the boot. The effect is most noticeable at higher speeds, where the car feels more planted and balanced front-to-rear. These are aero aids, not a substitute for suspension or tyre changes.

Should I have it professionally fitted?

Yes. Dry-carbon panels are more brittle and far less forgiving than the factory plastic bumpers, and correct panel gaps, secure mounting and clearcoat protection all need a body shop. Professional fitment protects the parts and gives the flush, factory-grade result the kit is designed for.

Can I buy individual pieces instead of the whole kit?

Yes. The kit is built from discrete components — front lip, canards, bonnet, side skirts, fenders, rear lip and wing — so you can stage the build. For a front-end change, start with the front lip and canards; for the full look, add the bonnet, skirts and wing over time. Contact AME Motorsport to confirm current availability of single pieces for your G8x M4.

Build your M4 with AME Motorsport

If you are planning a carbon aero package for a 2021-onward BMW M4 Competition, AME Motorsport can supply the CMST pieces and help you stage the build. Start with the CMST body kit for BMW range to see the carbon components, then get in touch to confirm fitment and the bonnet finish that suits your car.