I just installed a Stebro stainless exhaust. I like it and it cost only 450.00 Im searching for a new or used muffler for a 1988 BMW M5 z28. A new one from BMW is in the range of about $750. As long as the used one is still in good shape, it will suffice. Anyone know where I can find one cheaper than $750. The cheapest Ive come across so far is $620.00 brand new. This is still too much. Any help is greatly appreciated.