Hello, the following question…. How do I recognize a C20XE camshaft with 100% security? It’s about the following: We made my revised XE fit again and had a known a second couple of XE camshafts lying around. So, now we thought that we look which looks better and then we install them. Pusterity cake!!! Common confusion prevailed because the camshafts had quite different numbers, certain numbers in another place or even not at all. So we took my old cams again because it went well with it. When everything was already installed I went to a LET engine which hangs in the hall in a Kadett convertible and screwed off the oil cover….. On the intake camshaft of this engine I could recognize the following number: 2091358 The same number is also on my XE camshafts. However, this is not a GM number, so it is not the GM logo before but just the number for itself. he was not on the camshafts of the buddy alerdings!!! So, now of course the question arises if I drive with turbo cams walking…which would be totally negative. According to the previous owner of the LET engine you know nothing by an increase in performance by XE camshafts. Here I give you now now all numbers that I have found on my camshafts, that would be these: Outlet: 2091358 and I think then came G425 (with the G I am not sure) Inlet: 2091358 and how i I didn’t find a 0 except four times. What am I going to do for a walk???