Plue for what nomodsjk said, the most I made was 457 WHP and 330( 3 days) motor said see YA. I had every mod you could have for the kit, Impeller ( 12 PSI) Injectors, pump, plugs, MAF's, heat exchanger and tune. The kit in the "Stock" form is safe outside that your asking for trouble, Just IMO I was shooting for 500 WHP, The Stillen will never get there. Like Swiss said for 500+WHP you'll need turbos.
With that said the kit is very good I really loved it. Most likely will have it again. Just wont mod it. 412-420WHP is enough LOL, For me anyways
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14 Q50 AWD, ARK, ECUTEK (SEB), Takda, 
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