Hey, new to this site and this topic has probably been brought up many times before, but i'll ask anyway. I got a 97 Ram with the 318 and it has 140,000 miles on 'er. It's got a lot of miles on it but it sure is strong. Anyway, I got the 40 series flowmaster put on and recently been tossing around the idea of getting the Magnaflow cat put on. Basically what i'm asking is, would it be worth it with such high miles on my truck? and also how much louder would it be? Thanks for your input!