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Hmmm, we made 474/445rw on 93 with headers, my ported IM/TB, AFE CAI, in a buddies A8 C7. It was a pretty good weather day as well. I honestly think you will need E85 with a ported MSD to break 500rw in a M7 car SAE. All dyno's are different. Does it say it makes peak power at 5,380rpm?
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