No inspections here. And yes, the few number of users who remove cats pale in comparison to what an airplane puts out in its lifespan. And what about people who drive cars pre-cat?

Anyway, I read more and see that the four part manifolds are the most critical part of the setup. So I will be hunting for those first before I have the shop see what they can then do. From what I can see, its the earlier years that have the four part manifolds? I was looking on the German eBay and the later manifolds looked no different from the US version.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car