I had full exhaust on my RX7 and it was so loud inside you couldnt have a conversation, this is quite the opposite, it stays nice and quiet inside the car and outside. My goal was for the exhaust to breathe when it needed to and to be quiet under 3k. For driving through my neighborhood and such. So when your on it, everyone knows it, but when your sitting still you make no noise at all....very tolerable.