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Discussion Starter · #1 ·
Sorry for all the questions lately, I just want to make sure I do my car right.

I have an AP and a catback currently being shipped to me. I've searched around and didn't really get a clear answer for the year of my car (2015 WRX) on whether or not a tune is needed for a catback exhaust. I ordered a Borla exhaust which I know would't be compatible with the AP anyway.
Do I need to tune the car after the exhaust or will it run fine without? Thanks in advance.
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