Im going to be buying Borla ATAK mufflers for my car. Should I replace my over axel pipes as well? The only thing wrong with my Ford pipes are that the Pypes mufflers had to be welded on. With that being said, the brand new Borla axelbacks would have to be welded on as well. Is welding a bad thing? I also understand that the Ford pipes are just bent, and the Borla pipes are mandrel bent. Thank you for your time.