I just got a used Greddy SP2 catback exhaust and before I put it on I was wondering if I should paint it with some kind of rust guard or something. Rust is a pretty big problem with cars in my area and I dont want my 500$ exhaust rusting through. I know its SS, but will SS ever rust under harsh enough conditions?? Or is my exhaust pretty much rust proof??

 

i've had mines for a while, no rusting problems yet