When the new (F66) 2025 MINI Cooper JCW debuted earlier this year, it surprised MINI enthusiasts by shifting from a dual exhaust layout to what appeared to be a single, large outlet. However, that was only part of the story—something had been hiding in plain sight all along.

The single-pipe layout aligns with MINI’s new minimalist design language and reflects the brand’s focus on greater efficiency. It also mirrors JCW race cars, bringing the production model closer to what we’ve seen at the Nürburgring and other tracks around the world. But there’s more beneath the surface.

Upon closer inspection of the images, you can clearly spot a second exhaust pipe just to the left of the center outlet. This design closely resembles the standard MINI Cooper S exhaust, where the second pipe is discreetly tucked behind the rear valance.

Why the 2025 MINI Cooper JCW Has a Hidden Second Exhaust

According to our sources, the second exhaust was an engineering necessity for two reasons. First it’s important to remember that the new F66 JCW carries over its engine—and full drivetrain—from the previous F56 model, including tue basic exhaust system design. Since MINI didn’t fully re-engineer the engine, two exhaust outlets were still required.

Second, the EU’s ever-increasing emissions regulations required a rethink of the exhaust design to further minimize CO2 output. Like the Cooper S, one of the strategies employed was a secondary exhaust outlet design (with a flap) that burns slightly cleaner than before. While we don’t yet have the technical details behind it all, we’ve been told it’s one of a handful of small changes MINI had to make to the JCW’s drivetrain to meet Euro 7 regulations.

From what we understand, performance remains unchanged, and the exhaust functions identically to the system found in the previous F56 MINI Cooper JCW.

The previous F56 Cooper S Exhaust design shows that the “dual exhaust” is nothing more than two small pipes from a single exhaust.

If you look at the schematics of the F56 JCW exhaust, the layout is conceptually similar, with two outlet pipes extending toward the rear. The F66 JCW retains this setup but relocates one of the pipes to the left side of the muffler, concealing it.

What do you think? Should MINI have pursued this direction, matching its race cars and simplifying the design? Or do you prefer the classic dual-pipe look? Let us know in the comments below.