I have had mine installed now for a couple of months and I'm already seeing surface rust on the 3 rivet heads and the 3 protruding pins. Would stainless steel have been better there? Perhaps there is a good reason why they used what they did, but they are rusting. I'll keep the rivets buffed and coated with a dab of some kind of product for protection. What would hold up and be good to use there for that? I'm very curious to know what part they're replacing in the pulley for you.