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Discussion Starter · #1 · (Edited)
I currently have a manifold, which has 2 42mm exits to the primary damper.
The stock exhaust system (primary) has 2 entrances of 36-37mm.

If I can make the transition more gradual, would this still be too restrictive?

Freshly rebuilt engine is using Motronic and has standard internals.

Edit: car will be mainly used for normal street driving.
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