I have the opertunity to purchace as much of a 2 door 280SL exhaust system as I want/can use. The rear and center muffler look identical in pictures to what my 280SEL has. The front exhaust pipe(s) [the pair] seem the same design but to short.

Question: can I use the Mufflers and pipes which go over the axle?

Hell, if thats the brutally expensive dual exhaust system.... I'd probably bag the SL final section and hope for the best, even adding extension pieces as necessary.

Most muffler shops hate makin adaptations - but you could be saving yourself a couple hundred dollars.