For what it's worth, I had an '84 318i that I replaced the original muffler with a Midas. I had the car for 15 years and never paid Midas another dime for mufflers which had to be replaced about every three years or less. The main problem with theirs is that they're "cheap" and tend to develop rattles, but I never had a single arguement about replacing them. On a 318, though, everything is a single piece from the catalytic converter on back, so there were never any ancillary "pipe" charges.