25% loss is far too high, it is around 20% for a 6MT 370z. I am not sure if it has been officially measured but I can assure you that unless you are running a forced induction setup, there is no way you are putting out 420hp at the crank. Unless someone cracks VVEL, 400hp at the crank is not possible even with full bolt-ons.
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-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
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