I found negligible gain with tailpipe baffles out, although maybe that will change when I change the pulley on the supercharger. It is noticeably louder with baffles out so I'm thinking I'll leave them in to appease the neighbors. But if folks think baffles out makes more than negligible power - particularly with the pulley change or other mods - then the neighbors will just have to insulate their windows. Any other thoughts on baffles in or out regarding power, noise, or other?