Is there a sure way to check that the 18 inch alloys are factory fitted to the car they're on? I know Bravo's with factory fitted 18's actually had different steering rack and body numbers because of how big the wheels are because I've just bought a new 150 t-jet and it had the 18's on them but I obviously don't know if they're factory fitted or added after market. If someone could tell me the body numbers for the 18's and where to check that would be brilliant. I can't get access to Eper to find out myself :/ this would be a huge help. Cheers FF