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Mark Leader just Dynoed at R&D Dyno :He has JWT sport 500s completely stock internals,no porting,single pop,2 1/2 inch downpipes,complete 2 1/2 inch custom mandrel bent exaust,and a UR crank pulley. His car hit 438 rwhp and 475 rfpt @ 24psi on race gas. tuned with a afc. That was really out on the efficiency range for those turbo's as he only made 10 less foot pounds @ 21psi.
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