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Unfortunately, I have to believe that these numbers are inaccurate. These cars make anywhere from 405- 420 rwhp stock. As much as we in the aftermarket industry would love for this to be possible, there are no Head/ Camshaft combos available by themselves to add 180 hp, not to mention an additional 280 hp. Perhaps they are trying to state flywheel hp for the 580, and then flywheel hp with nitrous on the 680. We should have some results on our car soon.
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