Muffler and exchanger pairing Options

[trick-e]

Looking for a little help.
I’ve a ‘75 (originally a 1.8) upgraded with a ‘73 2.0.
I need a muffler, but am a bit confused on which one.
The heat exchanger exits into a single throat, triangle flange.
I ordered a used Bursch for a ‘73 2.0, but it’s a dual-throat ‘in’ and the trapezoid flange. Reading other threads/classifieds, the one I received should be the correct one.

So, different heat exchangers for different years of the 2.0?

I’m running a 4-tip Monza that’s rusted out.

-TK

[davep]

Pretty much a reiteration of the above, but there are three exhaust SYSTEMS over the years. A system comprises the heat exchangers, the muffler and the muffler hanger plus all the gaskets and seal rings. The 1.7 and 1.8 engines used one system from 1970 through 1974 model years. The 2.0 engines used one system from 1973 through 1974 model years. The final system was for 1975 & 1976 (all engines) and could include a catalytic converter next to the muffler. Each system basically requires the complete set of parts; no mixing of parts between systems.