I would be inclined to believe the first post isn't too far off. Given that the NeedsWings intake bosted it an average of 25 Horsepower at the wheels, I don't think another 50-60 RWHP with the Pulley and ECU is unrealistic. I believe the engineers stated that measrued Drive Train Loss on the SRT-6 is about 16-17%. Calculating a RWHP of 380 then add back the 17% loss and you get about 459 HP at the crank. I calculated my RWHP off my timespils and weight and came up with 290 RWHP, that's roughly the same that we have actually seen them put down on a Dynojet. The math all works out to me.