So when I still had my 98 I sold one of my previous exhaust systems to a buddy of mine. It had a Magnaflow dual in single out high flow cat and after that a 2.5 inch pipe to a cherry bomb extreme. He didn't want the muffler so I just told him to cut it off and give the muffler to me the next time I saw him. Well it's been a couple of months now and I saw him tonight and he said that the muffler was in the bed of his truck. I got it and it is kind of rusty on the inside walls of it. Not too bad but still kind of alarming. My question is, will this affect sound and flow??? I plan on putting it on my 09 with the 5.7 Hemi.