I'm sure this is no big deal for any kind of reputable exhaust shop. The key being reputable. It's virtually guaranteed that they deal with worse every day from the meth-fueled cat thieves out there.
Since Otramm stopped making the stainless exhaust components, I'd just go with Magnaflow or similar and let exhaust pros weld in whatever's necessary.
Since Otramm stopped making the stainless exhaust components, I'd just go with Magnaflow or similar and let exhaust pros weld in whatever's necessary.