DCE Parts S58 200 cell downpipes + DCE single midpipe
Tune
MHD Stage 2 (S58 licence)
Fitted by
PSR Parts workshop, Woerden
Photos
PSR Parts
The Story
The S58 in the BMW G80 M3 responds to hardware and software like few other engines, and this green M3 is a great example of what a well-matched Stage 2 setup can do. The car was fitted and tuned in our workshop in Woerden with DCE Parts S58 downpipes with 200 cell catalysts, a DCE Parts high flow single midpipe and an MHD Stage 2 tune.
It starts at the turbos. The factory downpipes on the G80 M3 use dense catalysts, and on European cars particulate filters, that restrict the exhaust gas leaving the twin turbochargers. The DCE Parts S58 downpipes replace them with larger, smoother piping and high flow 200 cell catalytic converters. Less back pressure means the turbos spool more freely, boost builds faster and exhaust temperatures drop. Because this version keeps a high flow cat, it is the more road-focused choice compared with a catless or catlook downpipe, while still giving a clear step up in response and sound. As with any downpipe, check the rules in your country before use on public roads.
Further back, the DCE single midpipe takes the place of the factory midpipe with its resonators. The single pipe layout removes restriction in the middle of the system and is what gives this G80 M3 its raw, aggressive S58 single midpipe sound: a harder edge at full throttle, more crackle on the overrun and a noticeably louder cold start. Because the midpipe sits ahead of the rear silencer, the valve control and the exhaust button keep working as before, so you can still switch between a calmer mode and the full sound.
Hardware like this needs the right calibration, which is where the MHD Stage 2 tune comes in. MHD software adjusts boost, timing and fuelling to make use of the extra flow and keeps the engine management happy with the new downpipes. The result is noticeably more power and torque, sharper throttle response and a car that pulls harder through the whole rev range. A Stage 2 map is required with aftermarket downpipes, and we always advise having the tune set up and checked by a specialist.
The DCE Parts downpipes and single midpipe bolt straight onto the G80 M3 and the G82 M4, and the downpipes also fit the G87 M2. Watch the video on this page to hear the result. Want the same G80 M3 downpipe, midpipe and MHD Stage 2 package? Everything is available at PSR Parts and can be fitted and tuned in our workshop in Woerden.
DCE Parts ships from the Netherlands (EU). For orders to {land} we charge 0% VAT. Import duties, local taxes and customs clearance fees are not included. They are charged by the carrier or customs on delivery and are payable by you.
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