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CMST makes two carbon-fibre aero kits for the Xiaomi SU7: the restrained Thunder street kit and the fuller War God kit. Both are designed specifically for the SU7 electric sedan, both are formed in high-modulus carbon fibre, and both bolt onto the factory body. The core difference is reach: the Thunder kit is a cleaner package built around a simpler front lip and a diffuser that blends into the OEM bumper, while the War God kit adds more aggressive geometry, a layered rear diffuser and a set of rear bumper wrap-corners the Thunder kit leaves out.

• Vehicle: Xiaomi SU7 (2024-on electric performance sedan)
• Fitment: Designed for the factory SU7 body; bolt-on / fitment over OEM panels
• Material: High-modulus dry-carbon weave (autoclave-style prepreg, show-weave clearcoat)
• Two kit options: Thunder street kit (streamlined) and War God full aero kit (maximum aggression)
• Finish: Gloss or matte carbon clearcoat over a 2x2-style plain weave

The SU7 is Xiaomi's first car, a low-slung electric sedan with a coupe-like roofline and a factory pop-up rear spoiler. It is a clean shape to build aero around, and CMST sells two distinct routes. If you want the full picture of what is available, AME stocks both kits within the CMST range. The sections below break down each kit, set them side by side, then work through every panel so you can decide which spec suits your SU7.

The two CMST SU7 kits at a glance

Thunder street kit

The Thunder kit is the streamlined option. Its front lip uses a single angled cut that meets the headlight line, a shape chosen to reduce airflow separation at the front axle and improve high-speed stability rather than to look dramatic. The rear lip carries a saw-tooth diffuser edge that blends straight into the factory diffuser so air passes through quickly and rear lift is reduced, finished with a central red accent strip. It is the kit for owners who want a sharper, more purposeful SU7 that still reads as a daily-driven car. Both kits sit within AME's wider CMST carbon fibre body kit range.

War God full aero kit

The War God kit is the fuller, more aggressive package. The front lip is laser-cut to form sharp corners that meet the headlight line, and the carbon wheel-arch trim extends down to the base of the lip for a more built-up front end. The rear is a two-layer design: a smooth upper airflow plate over a lower section with serrated, slotted openings to cut rear lift, plus a water-drainage channel inside the rear bumper to stop rainwater disturbing airflow. The War God kit also adds rear bumper wrap-corners that the Thunder spec does not include, so it is the heavier, more complete of the two.

War God vs Thunder: side-by-side

The table below compares the two CMST SU7 kits piece by piece. Both share the same carbon-fibre construction; the difference is in geometry, the rear diffuser design and the panel count.

Piece-by-piece detail

Front lip

Both front lips attach below the factory bumper and finish against the headlight line, but they take different approaches. The Thunder lip is a three-piece set with integrated corners and a simpler angled profile; the cut is shaped to reduce front-axle airflow separation, which is what helps the car feel settled at higher speeds. The War God lip is more sculpted, with laser-cut edges forming sharp corners and carbon wheel-arch trim that runs down to the base of the lip, giving the nose a deeper, more layered look. Laser-cut edges on both kits are designed to sit tightly against the OEM lights for a clean panel gap.

Rear lip and diffuser

The rear is where the two kits differ most. The Thunder rear lip uses a saw-tooth diffuser edge that blends into the SU7's factory diffuser, letting air pass through quickly to reduce rear lift, and it carries a central red accent strip for contrast. The War God rear lip is a two-layer design: a smooth upper airflow plate sits over a lower section cut with serrated, slotted openings that work to reduce lift at the tail. CMST also builds a water-drainage channel into the rear bumper on the War God kit so rainwater drains away instead of pooling and disturbing airflow. Both are practical aero details rather than styling alone.

Side skirts

Both kits include carbon side skirts with a stepped carbon edge that adds a layered look along the flanks and visually lowers the car. The War God skirts go a step further with inset airflow fins, or strakes, that tie the front and rear of the car into one continuous airflow channel down each side. Side skirts help tidy the air running along the body between the wheels; the War God fins make that channelling more deliberate.

Rear wing

The SU7 already has a factory electric pop-up spoiler, so neither CMST kit removes it. Instead, both add a separate carbon rear wing. The War God wing has a slight upward arc designed to add rear downforce, while the Thunder wing keeps a cleaner profile. Because the factory spoiler is retained, the carbon wing sits as an additional aero element above the boot, in cleaner air, which is where a wing does its most useful work at speed.

Which SU7 kit should you choose?

The decision comes down to how aggressive you want the car to look and how it will be used. The Thunder kit suits owners who want a cleaner, restrained street look for a daily-driven SU7: it sharpens the car without the extra rear hardware and is the slightly lighter spec, since it leaves off the rear wrap-corners. The War God kit suits owners chasing maximum aggression and a track-inspired stance, with its layered rear diffuser, channelled side skirts, deeper front lip and the full set of rear corners.

Either way you are buying the same carbon-fibre construction, so the choice is about geometry and stance rather than material quality. You can compare both alongside other carbon programmes in AME's carbon fibre body kit collection.

Dry carbon vs FRP vs the factory PP

Both SU7 kits are made from dry carbon fibre, and it helps to understand what that means against the alternatives. Dry carbon (prepreg carbon cured in an autoclave under heat and pressure) is the lightest and stiffest of the common options, with a crisp, consistent weave that is left visible under clearcoat. FRP, or fibreglass-reinforced plastic, is heavier and less rigid but cheaper, and it is usually primed and painted rather than left bare. The factory SU7 bumpers are moulded in PP (polypropylene), which is tough and flexible but offers none of the weight or stiffness benefit of carbon.

For an electric car, keeping weight down and managing airflow both matter: lower drag and reduced lift help efficiency as a general principle, and lighter panels are always welcome on a heavy EV battery platform. The trade-off with dry carbon is care, as the clearcoat that protects the weave can dull under prolonged UV exposure. Browse the full CMST body kit range to see how the same construction is applied across other models.

Frequently asked questions

What is the difference between the CMST Thunder and War God SU7 kits?

Both are carbon-fibre aero kits for the Xiaomi SU7. The Thunder kit is the streamlined, cleaner spec with a simpler front lip and a diffuser that blends into the factory bumper. The War God kit is more aggressive, with a deeper laser-cut front lip, a two-layer rear diffuser with slotted openings and a water-drainage channel, channelled side-skirt fins, and an extra set of rear bumper wrap-corners that the Thunder kit does not include.

Can I mix pieces from both kits?

The two kits are designed as complete, coordinated packages, so each is intended to be fitted as a set for a consistent look and correct panel fitment. Individual panels are model-specific to the SU7, and mixing pieces can leave mismatched edges where, for example, a War God front lip meets Thunder side skirts. If you want a particular combination, confirm panel-by-panel compatibility with AME before ordering rather than assuming pieces interchange.

Does the carbon wing work with the SU7's electric pop-up spoiler?

Yes. Both kits keep the factory electric pop-up spoiler and add a separate carbon rear wing as an additional element. The carbon wing is a fixed aero piece mounted on the boot and does not replace or interfere with the factory spoiler's pop-up function.

How do I care for dry-carbon parts?

Treat dry carbon like any clearcoated painted panel. Wash with a pH-neutral car shampoo, avoid harsh abrasives, and dry with a soft microfibre cloth. The main long-term enemy is UV, which can gradually dull the clearcoat over the weave, so park in shade where you can and apply a quality wax or paint-protection coating periodically to keep the finish crisp.

Which kit suits daily driving?

The Thunder street kit is the better choice for daily use. It gives the SU7 a sharper, more purposeful look while keeping a cleaner profile, omits the extra rear wrap-corners and is the slightly lighter spec, which makes it easier to live with day to day. The War God kit is aimed at owners who want the fullest, most aggressive carbon presence.

Do I need professional fitment?

Yes, professional fitment is strongly recommended. Carbon aero panels are precision parts, and correct alignment, secure mounting and clean panel gaps make the difference between a factory-grade result and a kit that looks aftermarket. A qualified installer will also handle any trimming, adhesive and bracket work correctly so the carbon is not stressed or damaged during fitting.

Ready to upgrade your SU7? Compare the Thunder and War God kits and check current availability in AME Motorsport's CMST carbon fibre body kit collection, or browse the wider body kit range for more carbon options. The AME team can confirm fitment and the right spec for your SU7.