1- do you need to dynotune after fitting turbo back 3” exhaust
2- cat back muffler, dynotunecrewuired?

I’m asking as my WRX has over 300k and the tuners are not willing to tell me if I can get away with either the full or partial exhaust ..

I just want it to sound like a WRX as it has a std exhaust now.

Engine will be rebuilt in about 12-18 months.


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