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not sure if it burned or simpy broke?? I am thinking the latter.
what do you guys think? was on 200hp shot.

Ouch, I hate to see that. The broken valves give some backing to the "broke" cause rather than the "burned up" nitrous failure. But it can be tough to figure out what came first, the chicken or the egg. Heat failure or valve train failure could be related. I really have no idea on this one.