Not sure if the stud spacing is the same for the C4 and C5 but when I went looking for a 3mm (1/8") spacer I noticed that the BMW has the same 5x120 spacing as my C5. I just did a search on ebay and was able to find some that worked that way. Something like this maybe for 3/8" :
Not sure if the stud spacing is the same for the C4 and C5 but when I went looking for a 3mm (1/8") spacer I noticed that the BMW has the same 5x120 spacing as my C5. I just did a search on ebay and was able to find some that worked that way. Something like this maybe for 3/8" :