I ordered a K&N FIPK and I am going to compliment it with the Gibson cat back exhaust. I just want to know if you guys think I should get the aluminized one, or is it worth $100 more dollars for the stainless steel one? I think I am leaning towards the stainless b/c I will never have to worry about it ever again. Am I on track here, or will I never have to worry about the aluminized one either? Also for you people that did it already, did you get any rattles or other problems from the install? I know that sometimes w/aftermarket items, they don't fit perfect, and you have some problems with noises etc.?