Wow As soon as I saw caliper covers and changing the leather inside the car I stopped reading.. Honestly.. You can't stop rotors rusting, their steel, as soon as it see's water it rusts in minutes, if you buy Dba slotted it will still do it, just get new pads.. Also don't change the leather your gonna give slortivos a bad rep :/ Do you have chrome wheels? Lol just a Q... Get ces extractors and exhaust, stock cat is fine.. A sound system? Honestly sounds like you wanna be fully sick bro.. ? Lol