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Good Morning All, I have a 2009 wrx, what do you guys think would be symptoms of an exhaust leak? I'm only boosting at 9psi, it stupid loud and has a fluttering kind of noise, sounds like slow spool and don't hear much whoosh sound than I think I should, exhaust smell in cabin, also sometimes a little bit, or barely smoke in cabin. Wastegate duty:74%
 

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Smoke in the cabin? I’ve had open headers in cars blow right on the firewall and never had that.

My thoughts would be a leak at the up pipe
 
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