I dont know why but it is next to impossible to get specs on holset turbos. On the bright side I hear nothing but good things about holset turbos...

I took your advice on researching gsr vs itr cams and this is what I've found. Pertaining to a boost setup, the gsr cams are supposed to be better if you just slap them in, however if you have adj cam gears and a tune to eliminate the overlap, the itr cams will out perform the gsr's by quite a bit. Think Imma keep my itr cams and get some cam gears. Don't plan on boosting without a tune anyways.

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