A G37x dynoed at a shop by me @341whp. It had full bolt-on's. Stillen CBE, Intake, HFC's and an UpRev tune. It had a baseline of 315whp without the tune. I don't know how much it dynoed stock at this particular dyno, so its hard to calcultate hp @ the flywheel.
A tech said Z's had similar readings. Seeing as how our engines are pretty much the same, a 370 could easily see those gains without having to go FI. Some would say the shop's dyno tend to read a little high, but you really can't argue the gains over baseline with the tune. 400 hp with a 15% loss is about 340 whp.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
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