I got the OBX turbo back (comes catless) and the out of box experience with that was unbearable. the holes in the downpipe werent big enough to fit over the studs on the turbo so i had to dremel them out with a carbide bit. It was very droney from like 1800-2400 (most of the operating RPM lol) and also really smelly. Sitting in a drive through line was a chore. I could deal with the drone when I was in the car by myself, but it was almost embarrassing trying to have a conversation in the car with my mom or grandma as a passenger. After welding in that 200 cell flowmaster cat, it quieted down a LOT, drone is gone, zero smell inside the cabin with the windows up. Its still stinkier than a normal car when you stand behind it, but thats to be expected. I adore the way my car sounds now, especially with another car to my left or a median to reverberate off of lol. If I could get over the way the tip looks i might want to try a turn down exhaust tip from how much I love the way it sounds
Stock OBX you probably wont like, but now almost every time a fellow car enthusiast rides in my car they go crazy for the sounds it makes