For the ultimate in tuning potential and exhaust sound, Eisenmann offers these stainless steel catless downpipes to make the F90 M5 an even more powerful machine. They are designed for dedicated track-day cars and enthusiasts, and it will also add to the overall experience of what’s already a stunning performance car.

The catalytic converters found in the factory downpipes are the primary causes of exhaust flow restriction. Exhaust gas must pass through the catalytic converter’s these tiny honeycomb weaves on their way to the exhaust system, thus restricting flow. Eisenmann’s catless downpipes offer massive reduction in exhaust back pressure, allowing for more power and faster turbo spooling. Due to the increase exhaust flow, engine ECU tuning will be required to remove any CEL warning that might appear.