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Tim is more comfortable with the Two-Valve in the car since it's a known entity in his eyes. The Two-Valve is the same basic combination Tim has run since joining the Real Street class. However, these days the Two-Valve boasts a Trick Flow intake and heads. Tim says the Trick Flow Two-Valve heads flow better than the Three-Valve heads so this combo makes more power. Regardless of engine combo, Tim's power adder of choice is a ProCharger P-1SC II supercharger. As of the NMRA Atco event, the new car is already running 9.40s with the Two-Valve.