Son wants a thumper cam...which one?

Thanks guys...they sound good...he is looking up the information now and will pick the one with the best sound. Hell we all know how a 20 year old is..about 200 years ago I was one too.
Yup 68383 GTS...he is like me loving to live on the edge..but I think that he has a lot better head on his shoulders than me.....I was stupid enough to spend 1652 days in Iraq and am chomping at the bitt to go back....

Jeff