Spoiler or wing — which do I want?

A spoiler if you want the look and less rear lift without adding drag, which covers most road cars. A wing if the car is used on track and you need real downforce and will accept the drag penalty.

Does fitting require drilling the boot lid?

It depends on the design. Many are bonded with automotive tape plus locating pins; some are bolted through. The fitting method is stated with the part.

A short spoiler that turns up sharply at the trailing edge of the boot lid, so the airflow separates cleanly instead of curling down behind the car. It is a spoiler, not a wing.

Will a spoiler fit over the factory one?

No — the factory spoiler comes off first on the vehicles that have one. The CMST part is a replacement, and the mounting points are cut for the bare boot lid.

Do you make a boot-lid spoiler and a roof spoiler for the same car?

On some vehicles, yes. Both are on this page: a roof spoiler mounts above the rear screen, a trunk spoiler sits on the boot lid itself, and they are quoted as separate parts even where a car takes both.

Aero parts · made to order

Rear Spoilers

A spoiler sits on the body: it spoils the airflow coming off the roof and cuts rear lift without the drag of a wing.

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Close-up of a CMST carbon fiber ducktail rear spoiler, showing the weave and mounting edge

A spoiler is not a wing

Supply terms

Mounting: Bonded and bolted to the boot lid or body — no struts, no air underneath
Types: Ducktail · decklid spoiler · OE-style lip spoiler
Choose a wing instead if: You need active downforce and accept the drag — see rear wings
MOQ: 1 piece, mixed across parts and vehicles
Lead time: 7–20 days on standard orders
Warranty: 3 months on carbon parts from the date of fitting
Packing: CMST-branded export packaging with product label and parts pack

Every mold starts from the car's own body surface. A 3D-printed sample is trial-fitted on a real vehicle before the mold is cut, and the first production part is fitted again before it ships.

Roof spoilers

Mounted at the trailing edge of the roof, above the rear screen — a different part from a boot-lid spoiler.

A roof spoiler sits at the back of the roof panel and sets up the airflow before it reaches the rear screen and whatever is on the boot lid. On hatchbacks and estates it is the main rear aero device; on saloons and coupes it works with a boot-lid spoiler rather than instead of it.

The same small family covers roof vents and roof air scoops — openings in or above the roof panel, which CMST tools on a handful of vehicles. This is a short list and it is meant to be: the parts that exist are listed, and anything else is a tooling request.

Vehicles carrying this part

Anything else is tooled to order at MOQ 1, through the same 3D-printed sample and trial fit as a catalog part.

Trunk spoilers

The lip on the trailing edge of the boot lid. A short line — five designs across three vehicles, and everything else made to order.

A trunk spoiler is a lip bonded to the trailing edge of the boot lid. It is not a rear wing — no struts, no air underneath. It is not a trunk lid either — the panel itself stays on the car and only the lip is added.

The catalog records most boot-lid aero under the broader rear spoiler heading, which is why this line is short rather than because the parts are rare. If the vehicle you need is not listed below, ask for it against the rear spoiler range for the same car.

Vehicles carrying this part

Anything else is tooled to order at MOQ 1, through the same 3D-printed sample and trial fit as a catalog part.

Find your vehicle

Every vehicle below has at least one part in this category. Open a vehicle to see its kits, the material grades it is tooled in and what each kit contains.

Marques carrying this part

All marques

Grades this part is tooled in

Dry carbon
Prepreg, lightest, finished twill or forged weave.
Vacuum carbon
Gloss clear coat, the volume carbon grade.
FRP
Primed and paint-ready, for spoilers painted body color.
ABS
Molded-in gloss or matte black, no paint required.

Five grades run through the same molds. Ask for the grade by name on the quote — it changes weight, finish on arrival and price band, not fitment.

Questions buyers ask

Spoiler or wing — which do I want?: A spoiler if you want the look and less rear lift without adding drag, which covers most road cars. A wing if the car is used on track and you need real downforce and will accept the drag penalty.
Does fitting require drilling the boot lid?: It depends on the design. Many are bonded with automotive tape plus locating pins; some are bolted through. The fitting method is stated with the part.
What is a ducktail?: A short spoiler that turns up sharply at the trailing edge of the boot lid, so the airflow separates cleanly instead of curling down behind the car. It is a spoiler, not a wing.
Will a spoiler fit over the factory one?: No — the factory spoiler comes off first on the vehicles that have one. The CMST part is a replacement, and the mounting points are cut for the bare boot lid.
Do you make a boot-lid spoiler and a roof spoiler for the same car?: On some vehicles, yes. Both are on this page: a roof spoiler mounts above the rear screen, a trunk spoiler sits on the boot lid itself, and they are quoted as separate parts even where a car takes both.

Related categories

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Quotes come back with kit content, material options and lead time. Tuning shops and distributors only — we do not sell to vehicle owners.

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