I am looking to get an exhaust soon and I have a question for people who bought the different metals offered on the MBRP exhaust. I live in Northeast Ohio and we can get bad winters so I know the stainless will be the best bet, but I'm curious if I did get the aluminized steel how quickly would it get destroyed? I read somewhere the stock exhaust is aluminized but don't know how true that statement is. I'm just curious what the difference between the T409 and the T304 is if I do decide on stainless. Is the T304 worth the extra money over the T409? Thanks in advance!