Exhaust systems

I'm running a 2.25" system on my 5.7 I believe. I asked the shop for 2.5" that made it up for me, but I don't think he had it on hand. It's still pretty good and works just fine in my opinion. I think a lot of people go overboard on pipe size thinking that they need it for power. I think it mostly just changes the tone. For what it's worth, the 707 horsepower Hellcat only uses 2.75" pipes if I understood one of the comments correctly (they said 5.5" of unrestricted exhaust, which would be two 2.75" pipes). I know my car is pressed for space and ground clearance, so smaller pipes were fine with me. I have a set of turbo tube mufflers that give it a nice mellow tone that's not too loud. The electric cutouts are for when I want loud.