I am looking for proper MB Part Numbers for the exhaust system for a 1974 280C with California Emission Control System. This car has these weired thermal reactors, EGR, etc. and apparently the middle muffler is (was) not a standard 280C muffler. The same for the front pipes. The end muffler is easy, it is this standard "single-in, single-out" one.

Any help will be appreciated.

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1974 280C