If you own a G87 M2 and you have gone looking for the M2 CS trunk, you have probably hit the same wall as a lot of owners. You search for an M2 CS trunk, and the page fills with CSL trunks: CSL-style ducktails in carbon, from a dozen sellers, most of them looking alike. It is easy to assume they are the same thing under two names. They are not. There are two different ducktails here, and knowing which is which is the difference between your M2 looking like the M2 CS and your M2 looking like something else.

Two different ducktails

The CSL ducktail is a specific shape with its own history. It traces to the E46 M3 CSL and, most recently, the G82 M4 CSL: a raised, pedestal-style ducktail that stands up off the decklid. It is one of the most recognized rear-end shapes BMW M has ever built.

The M2 CS ducktail is not that shape. When BMW built the production M2 CS, it gave the car its own integrated ducktail, molded into a carbon fiber trunk lid. It nods to the CSL heritage, but it is its own line, sized and shaped for the M2's rear rather than lifted from the M4. Park the two next to each other and the difference is plain.

So M2 CS and CSL are not two names for one part. They are two different trunks.

How the market filled up with the wrong one

Here is why the search results look the way they do. The aftermarket got to the M2 first. Before the production M2 CS existed, tuners were already building CSL-style ducktail trunks for the G87, taking the famous M4 CSL shape and adapting it to the M2. Alpha-N's version, out in 2023, is the one most people picture, and it was widely copied. By the time the real M2 CS arrived in 2025, the market was already full of M4 CSL-shaped trunks, and copies of those copies.

That is what you are seeing when you search. Most listings for the M2 are the M4 CSL shape, or a copy of it, not the M2 CS shape. The naming does not help: nearly everyone calls the M4 CSL-shaped part a CSL trunk, which is at least honest about what it is, but it leaves the owner who actually wants the M2 CS look with very little to choose from.

Why it matters for your car

If what you want is the M4 CSL ducktail on your M2, there is no shortage of options, and some are well made. But if what you want is for your M2 to look like the M2 CS, an M4 CSL-shaped trunk will not get you there. It is, in the most literal sense, a different car's rear end fitted to yours. The pedestal sits differently, the proportions read differently, and to anyone who knows the cars, it reads as a CSL tribute, not an M2 CS.

That is not a small detail on a part this visible. The trunk is the first thing the eye lands on from behind. The shape is the whole point.

Shape is first, but not the only thing

Getting the shape right is step one. After that, the same things that separate any good carbon part from a cheap one still apply: dry carbon versus wet, the mold behind it, and the finish on top. A correct M2 CS shape in poorly made carbon is still a poorly made part. We lay out where that cost goes in our breakdown of why some carbon looks and feels expensive.

Where we land

We make the M2 CS shape. Not the M4 CSL ducktail, not a copy of someone else's tooling, but the trunk shaped to the production M2 CS, in dry carbon, finished to the standard we hold the rest of our catalog to. It is the part a lot of owners come to us for, precisely because it is the one that is hard to find anywhere else. It is offered in two editions, Production and 1:1 Precision, on the G87 M2 CS trunk page.

FAQ

Is there a BMW M2 CSL? No. BMW built an M2 CSL prototype, but only the M2 CS reached production. There is no M2 CSL you can buy from BMW.

Are the popular "CSL" trunks the M2 CS shape? No. They are the M4 CSL ducktail shape adapted to the G87, and copies of that. They are a different shape from the production M2 CS trunk.

Will a CSL trunk fit my M2? Yes, the common CSL-style trunks bolt onto the M2. The question is not whether it fits, but whether it gives you the M2 CS look. It does not. It gives you the M4 CSL look.