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CMST builds a full carbon-fibre body kit for the Tesla Model Y, and three finished cars — red, blue and black — show how differently the same kit can read depending on the colour and whether the widebody arches are fitted. The kit centres on a detailed front lip, optional widebody fenders, side skirts, a rear diffuser and a raised carbon rear wing, all in dry carbon fibre. This piece walks through the three builds, what each piece does on the Model Y's body, and how to specify your own.

If you are deciding between a subtle lip kit and a full widebody, seeing the same parts on three colours is the clearest way to choose.

Quick facts

• Vehicle: Tesla Model Y
• Builds shown: red (widebody), black (widebody), blue (standard width)
• Material: dry carbon fibre, clear-coated to show the weave
• Key pieces: front lip, widebody fenders, side skirts, rear diffuser, raised rear wing
• Fitment: bolt-on and tape-on; arches use brackets
• Finish: gloss carbon weave against gloss paint

Three Model Y builds, one carbon kit

The three cars share the same core kit but make different choices. The red and black Model Y wear the full widebody, with wider arches that push the stance out over the wheels. The blue car keeps the standard guard width and runs the lip, skirts, diffuser and wing without the arches — a cleaner, more restrained read. Side by side, the difference is obvious: the widebody cars look planted and aggressive, while the blue car looks sharpened rather than transformed. Neither is more "correct"; they answer two different briefs from the same parts shelf.

The front lip: detail where the Model Y is plain

The factory Model Y front bumper is smooth and a little anonymous, and the carbon front lip is where CMST adds the most visual interest. The lip extends the chin forward and adds structure to the lower corners, giving the nose the depth the standard car lacks. In dry carbon fibre the weave catches the light and draws the eye down and out, which has the effect of making the tall Model Y look lower and wider than it is. It is the single piece that does the most to change the car's expression from the front.

Widebody arches: red and black only

The widebody fenders are what separate the red and black builds from the blue one. By widening the front and rear guards, the arches make room for a wider or more deeply offset wheel-and-tyre package and give the Model Y the squared, motorsport-inspired stance that a tall electric SUV does not have from the factory. They are also the most involved pieces to fit, because they mount with brackets and demand a tyre-clearance check at full lock and full suspension travel. If you want the car to look fundamentally wider rather than simply trimmed, the arches are the piece that does it.

The raised rear wing: fixing the short tail

The Model Y's rear is short and high, and from some angles the tail looks abruptly cut off. The raised carbon rear wing is the kit's answer: by lifting a carbon aerofoil above the boot line, it visually extends the tail and adds the three-dimensional depth the standard rear lacks. It is the most attention-grabbing piece on all three cars, and it ties the rear diffuser and skirts together into a coherent design rather than a set of separate add-ons. On the widebody cars especially, the wing balances the wider arches so the car reads as a complete design.

Why dry carbon fibre on the Model Y

CMST builds the headline pieces in dry carbon fibre — pre-preg carbon cured under heat and pressure in an autoclave — rather than wet-lay fibreglass. The practical differences are weight and finish: dry carbon is light and rigid, and the clear-coated weave is a finish in its own right, so the pieces look like carbon rather than painted plastic. On an electric SUV where the styling is deliberately minimal, exposed carbon is a way to add visual richness and a sense of specification without changing the car's colour. The weave also reads as performance shorthand, which is part of why it suits the sportier widebody builds.

How to specify your own build

Start with the decision the three cars illustrate: widebody or standard width. If you want the planted, aggressive look of the red and black cars, choose the widebody fenders and plan your wheel-and-tyre package to fill them. If you prefer the blue car's restraint, run the lip, skirts, diffuser and wing on the standard guards. From there the lip, skirts and diffuser are common to both, and the raised wing is the finishing piece that defines the rear. Because the kit is modular, you can also build up over time — lip and skirts first, arches and wing later.

FAQ

Which Model Y colour suits the carbon kit best?

All three work, but they read differently. Gloss black makes the carbon weave subtle and the car looks monolithic; red gives the strongest contrast so the carbon pieces stand out most; the silver-blue sits between the two and shows the body lines clearly. Choose based on whether you want the carbon to blend or to pop.

Do I have to fit the widebody arches?

No. The blue car shows the kit without arches — lip, skirts, diffuser and wing on the standard guards. The widebody fenders are an option for owners who want the wider, more aggressive stance, and they are the most involved pieces to fit.

Is the whole kit dry carbon fibre?

The headline pieces — front lip, fenders, skirts, diffuser and wing — are pre-preg dry carbon fibre with a clear-coat finish, so the weave is visible. Confirm the material on each piece when you order, as some items may be offered in alternative finishes.

Will the kit fit my model year of Model Y?

CMST produces Model Y kits for different model years, and the bumpers differ between the original car and the 2025 "Juniper" facelift. Check that the kit matches your year before ordering so the lip, diffuser and arches line up with your bodywork.

Can I build the kit up over time?

Yes. The kit is modular, so many owners start with the front lip and side skirts, then add the diffuser, arches and raised wing later. Each piece bolts or tapes on independently, which makes a staged build straightforward.

Build your own Model Y

Want to spec a Model Y like one of these three? AME Motorsport stocks the range and can help you choose between the widebody and standard-width builds. Explore the CMST body kit range for Tesla, compare the CMST rear wing for Tesla and CMST widebody fenders for Tesla, or browse our wider CMST body kit collection for the full parts list and fitment advice.