Euro headers and Euro cats for the Z4M. Would like to sell these as a set. As such, there should be no issues with CEL's or compatibility. May sell separately, we'll see what demand says. Headers are from an S54 M3, no rust, totally solid. Don't know the mileage. The cats were purchased by me directly from BMW Europe, they have less than 3,000 miles on them. As you can see, the PN tag is still visible. If a sale is made this week, they will be shipped Saturday.