Ooh, this should be interesting - Jeremy recently sold an immaculate '85 300D so he knows very well the 123 engine bay. He has both an '87 300D and '96/7 E300 so he can directly compare 603-T and 606-NA.
But I have to agree with you. The NA 603 trades off nothing on the exhaust side for a manifold and air cleaner that hide the IP. I'll take the more balanced used of space in the turbo.
Sixto
87 300D
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