The blocks themselves have already proven to take 800+whp. Upgraded internals as you know are required once going past ~650whp. These are stout motors and with proper internals and TT kit you should be easily able to break into quadruple digits. I am on a stroked 4.5L and we are shooting for almost double what your looking for.
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Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054
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