(Not really sure if this is the right place, but feel free to move if not, Mods.)
I have been running a Borla cat-back on my Legacy GT wagon, and was the second owner. Had the tips lengthened to tuck on the wagon, and lived happily ever not-quite-after.
The years of playing rally car in sleet, salt and snow did a job on the Borla system, and first the Y-pipe separated (hellooo, duct tape!) and then one of the mufflers broke at the can, where the weld failed. Just rust.
Sent Borla an e-mail asking about buying a replacement can, as I knew they wouldn't warranty to the non-original owner. Man at Borla says, "Yeah, you're right, but send me a picture and I'll get you a price on a can." I do. Imagine my surprise when the next email says, "Hey, we'll warranty this, just send me your phone number and shipping address."
I was stunned. But instead of sending JUST a right-side can, they send a whole new catback system! Pretty cool. Knock me over witih a feather, and count me as a Borla customer for life. Wanted to post a cool story here, and maybe other folks running Borlas in the Salt Belt have had or are having issues. Might be helpful.