There was an XP in the monthly contest last month that had "S" front flares installed. OP didn't say if there was modification needed. As far as I can tell, the only difference is the front bolt. The XP shares one of the front bumper holes by the reflector. The S uses a hole a few inches behind the hole the XP uses. The hole is already there on my XP, but is covered up by the XP flare.
If no one else responds, check out that contest and PM the OP. Good luck

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