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do all restricted CDVs have stripes and numbers? i was getting ready to switch out my stock CDV (2011 335 xdrive) and i noticed that the stock CDV valve was all black, no stripes, no numbers, just like the M3 CDV valve i was about to put in.
i got the car CPO, so i suppose its possible someone has already switched it out with an M3 CDV, but it seems unlikely. has anyone seen a restricted CDV that's all black like the unrestriced M3 version?
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