I traded my Skunk2 stages ones for some supposedly Skunk2 stage two cams. My old stage ones were solid on the ends (no rings) and marked clearly with the traditional "M" and "2" markings known to be on Skunk2 cams. I noticed I could not see much difference between my Stage 1 exhaust cam and the "Stage 2" exhaust cam, but the difference on the intake cam was pretty noticeable when put side by side. The problem is these "Stage 2" cams do NOT have the "M" and "2" markings on them, and the ends are not solid. Both cams have two rings on the ends with the intake having a "Groove" next to the little lip. The markings are "F 6" on the exhaust and "G C" on the intake cam. I am almost 100% sure they are NOT skunk2 cams or stage twos. Does anyone here have any idea what they could be? I have searched and been looking at pictures of cams for the past hour here.. All stage twos clearly have the "M" and "2" stamps on them and they look totally wilder then what I have in my hand here...