thats what I was thinking. Now you mentioned welding; is the pipe on the muffler a different diameter than the 128? Reason I ask is to mount a 128 BMW perf. exhaust a simple connecting clamp is supplied which works well because the pipes are obviously the same size. And to answer the other gent, numerous people are selling 135 performance mufflers for a good price. NOW, all that being said, I do have a 128 BMW PE from Dan ready to be installed in the spring.