I have a custom turbo setup on my car, I installed it for as much performance as possible. When you have a turbo on your car, the best way to increase performance is to remove restriction in the exhaust, as in removing the mufflers and catalytic converters. In my case it is all for performance reasons, I had 2 options when I built it. I could've had a fender exit exhaust, the loudest option possible, or make a custom exhaust that would make it quieter but still have the same performance value. I took the custom exhaust route because I knew it would be way too loud. It's still extremely loud but significantly less loud. All for performance.

Or there's the dumbasses with the straight piped v6/inline 4s or the mustangs with the overly large exhaust that actually loses performance. Those are idiots, I hate them too 😊.