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The CMST carbon fibre body kit for the Tesla Model X adds a front lip with canards, side skirts, wheel arch extensions, rear lip, and a carbon rear spoiler to the factory SUV body — all in a carbon-and-FRP construction that addresses the Model X's lack of factory aftermarket aero options. The kit is designed for the standard Model X platform and uses OEM mounting points throughout. CMST also supplies a 21-inch 2-piece forged wheel (CT265) sized specifically for the Model X's rolling stock requirements.

• Vehicle: Tesla Model X
• Key pieces: Carbon and FRP front lip, carbon and FRP canards, carbon and FRP side skirts, FRP wheel arch extensions, carbon and FRP rear lip, carbon and FRP rear spoiler
• Optional wheels: CMST CT265 21-inch 2-piece forged alloy
• Materials: Carbon fibre (aero faces) / FRP (sub-structure and arch extensions)
• Finish: Exposed 2×2 twill carbon weave on carbon pieces; FRP sections gel-coat ready for paint

Why Modifying a Tesla Model X Is More Involved Than a Conventional SUV

The Tesla Model X presents a specific challenge for aftermarket aero work that most ICE SUVs do not: the factory body is designed for maximum aerodynamic efficiency at speed, with tight panel gaps, flush door handles, and a highly optimised underfloor profile already factored into the drag coefficient. Adding aftermarket aero components to a car already engineered for aero efficiency can conflict with the factory's airflow management if fitment is sloppy — which is why OEM-point fitment and panel-gap accuracy matter more on the Model X than on a comparable combustion-engine SUV.

The other factor is the Model X's kerbweight. At over 2,200 kg for dual-motor configurations, this is a very heavy vehicle by any measure. The performance numbers — the Long Range dual motor covers 0–100 km/h in approximately 3.8 seconds and the Plaid in around 2.6 seconds — are produced almost entirely through electric motor torque rather than weight reduction or aero optimisation. What CMST's kit contributes is visual transformation: it doesn't change the range equation or the performance figures in any meaningful way, but it significantly alters how the car reads against its stock SUV silhouette.

Kit Components in Detail

Front Lip and Canards

The front lip attaches under the Model X's factory lower bumper fascia, using OEM bumper mounting positions. It extends the lower chin profile of the front bumper, dropping the visual ground line and giving the front end a more deliberate aero treatment. The integrated canards — carbon blades mounted either side of the front intake area — break up the flat lower bumper surface and reference the visual language of performance-oriented EVs. Because the Model X already has active cooling requirements for the battery and drive unit, the canards are designed to work with — rather than obstruct — the factory lower grille openings.

Side Skirts

The side skirts address what is the most visually obvious proportional issue with the standard Model X: the tall sill section between the front and rear wheel arches, which reads as a large flat expanse of body colour below the door line. CMST's side skirts lower the apparent rocker height by extending a carbon-faced profile along the sill, creating a lower visual stance. For a vehicle that stands notably tall — the Model X sits considerably higher than a conventional sedan — any visual device that lowers the perceived centre of gravity makes a significant perceptual difference. The side skirts attach along the factory sill lower edge using OEM-style clips and adhesive backing.

Wheel Arch Extensions (FRP)

The wheel arch extensions are manufactured from FRP rather than carbon fibre. This is a considered material choice: arch extensions on a 2,200 kg+ SUV need to absorb minor flexing as the body rolls and pitches without cracking, which FRP accommodates better than rigid carbon at the thicknesses practical for arch extensions. The extensions add a subtle overfender flare to both axles, widening the visual track without requiring wheel offset changes. They are supplied gel-coat ready for paint, allowing colour-matching to body colour or contrast finishing.

Rear Lip and Rear Spoiler

The rear lip fits under the Model X's rear bumper lower edge and adds a modest diffuser accent to the otherwise clean lower rear fascia. The carbon rear spoiler mounts to the existing Model X active rear wing mechanism — the Model X features an electronically-deployable rear spoiler from the factory, and CMST's carbon unit adds mass and surface area to this existing wing without replacing the deployment mechanism. The result is that the CMST spoiler extends when the factory system deploys, providing a larger aerodynamic surface area than the standard wing at the speeds where the factory system activates.

CMST CT265 21-Inch 2-Piece Forged Wheels

The CMST CT265 wheels supplied as part of this build specification are 21-inch 2-piece forged alloys. Two-piece forged construction joins a forged barrel to a forged face using aerospace-grade fasteners, allowing the barrel and face to be sourced in different alloy profiles and combined at the ideal offset for the fitment application. For the Model X's weight class, reducing unsprung mass through forged wheel construction is one of the few modifications with a genuine impact on handling compliance — a heavy rotating mass (stock Model X alloys are substantial) directly affects suspension response rate and tyre contact patch fidelity over road surface irregularities.

21-inch wheels on the Model X maintain tyre sidewall height within a practical range for Australian road conditions — the significant tyre section height compared to the ultra-low-profile fitments common on 22- or 23-inch setups means ride quality and tyre longevity are not significantly compromised. This matters on Australian regional roads where tyre sidewall compliance over sharp-edge surface breaks is a real consideration. Explore the full range of CMST carbon fibre and forged wheels available at AME Motorsport for full wheel specifications.

Material Considerations for the Australian Climate

Carbon fibre body panels under Australian UV conditions require specific care that differs from the European and North American context where most CMST products are photographed and marketed. The UV index across Australian capital cities — particularly Brisbane, Perth, Adelaide, and Darwin — significantly exceeds the UV exposure levels in China, Germany, or the UK. A standard clearcoat over exposed carbon weave will yellow and begin to check-crack within two to three years in high-UV Australian conditions without protective treatment.

For Model X owners in Australia fitting CMST carbon components, the recommended maintenance protocol is: inspect the clearcoat finish every six months, apply a quality ceramic coating or high-grade UV-resistant wax after installation and maintain it on a quarterly schedule, and repaint or reclear any section showing UV checking before the clearcoat delamination reaches the carbon weave surface beneath. The FRP sections (arch extensions, sub-structure) do not carry UV risk in the same way once painted, but factory-quality automotive topcoat is required for durability and adhesion.

Fitment Path and Professional Installation

The CMST Model X kit uses OEM mounting points for all major components. Front lip and canards attach to existing bumper mounting tabs. Side skirts clip and adhere to the factory sill. Arch extensions bolt and adhere to the factory arch liners. Rear lip attaches to the lower rear bumper. The rear spoiler mounts to the factory wing assembly.

Despite OEM mounting, professional installation is recommended for the full kit because panel gap alignment on the Model X is tight by design, and the vehicle's smooth body surface means any misaligned kit piece is visible at short range. A body shop with electric vehicle experience is preferable — EV platforms have specific considerations around lift points, underbody panel removal, and proximity to battery pack components during any bodywork operation. For enquiries about CMST fitment support and parts availability in Australia, the CMST body kit collection for Tesla at AME Motorsport is the starting point. You can also compare the full range of Tesla body kit options across brands available at AME.

Frequently Asked Questions

Which Tesla Model X generations does the CMST kit fit?

The CMST Model X kit is designed for the standard-wheelbase Model X platform as produced prior to the 2021 refresh. The 2021-onward Model X refresh introduced significant changes to the front fascia, door handles, and rear light cluster. Verify generation fitment with AME Motorsport before ordering — front bumper geometry in particular differs between pre-refresh and post-refresh Model X.

Does adding a carbon aero kit affect the Tesla Model X's range?

Adding aftermarket aero components has a measurable but small effect on aerodynamic drag. The standard Model X already has a low drag coefficient for an SUV (Tesla publishes 0.24 Cd for the Model X). Aftermarket body kits typically increase Cd slightly due to less optimised underbody airflow management compared to the factory design. The practical range impact is minimal — likely under 2–3% in typical driving conditions — but any modification that increases frontal area or disrupts the underfloor seal is theoretically unfavourable to range.

Are the CMST Model X wheel arch extensions FRP or carbon fibre?

The wheel arch extensions are FRP (fibreglass-reinforced plastic). FRP is used here because arch extensions on a heavy vehicle need flex compliance to avoid cracking during body roll and road surface inputs. FRP provides this compliance at practical panel thickness. The extensions are supplied gel-coat ready for paint to match body colour or chosen contrast finish.

Can the CMST CT265 wheels be used with the factory TPMS sensors?

Yes. Two-piece forged wheels from CMST are designed to accept the factory Tesla TPMS sensors. The sensor transfer is typically performed at the time of tyre fitment — your tyre fitment shop handles sensor relocation from the factory wheels to the CMST wheels as part of the wheel and tyre swap process. No additional programming is required provided the sensors are retained from the factory wheels.

Does this body kit require any modifications to the Model X's active suspension or air suspension system?

The CMST kit does not require modification to the Model X's active air suspension system. However, owners should be aware that the standard ride height settings on the Model X — particularly in the lowered driving height mode — may reduce clearance between the front lip and steep driveways or car park ramp entrances. Selecting a higher ride height profile when negotiating steep entries reduces risk of front lip contact.