Hello! Recently started upgrading my 2017 WRX. I was wondering if it was possible when it came to exhaust, to use a mishimoto J pipe with an Invidia R400 cat back? Or mix match any exhaust parts from the turbo to the cat?
Should not be an issue at all. I have a grimmspeed downpipe and an invidia q300 catback. All exhaust use the same flange/bolt pattern with the exception of the 2 bolt vs 3 bolt flanges on some aftermarket manifold to uppipes. Only time I have seen discrepancies in this is poor quality off brand exhausts from like ebay.