I purchased a new 13 350 a month ago. I got a pro circuit full system when I got the bike and put it on. I never rode with the stocker. Bike ran great and had a lot of over rev. I ride vet intermediate for FYI. I was getting some deceleration pop so I called pro circuit to see if I needed my efi remapped for the pipe. They said the run stock mapping on the 350 with full system. So to the point, I put the stocker on to see how it ran. I am impressed with the stock pipe so much. Great bottom and top. Did anyone else notice that the stock pipe make great power compared to aftermarket.