Originally Posted by
Jr ///M5
Jon,
I looked on the ETK and it shows the M50 exhaust being 47mm. It shows the STOCK M5 exhaust to be 60 mm. It also showed a welding sleeve for the M50 and the size of it was 49mm. Local muffler shops may have a concentric reducer that could be made to weld the two together. The question that still needs to be addressed is if the system will physically fit on the 525, the other question is if the larger system will create enough back pressure for engine needs. Hope this helps some.
By the way, how's the sis liking the new BMW?
Jr