Hi, I have a question about my newly installed Walker exhaust. At 107K mile, my original exhaust has a leak towards to the end of the Y-pipe. Unfortunately neither dealer nor Indy is willing to weld patch the leak. So I had my local garage replaced it with a Walker y-pipe and front cat. The new cat is pretty good expect in the first gear. It is noisy and almost like “popping” when starting. I hope it is just it is just for a burn-in period. But it has been three weeks now. (It is not my daily drive and pretty much only drive it on the weekends). Do you know eventually it will get better?