Once your working with Full Exhaust HFC or headers, you will require a tune. Saw guys with full bolt on making less power then me on the Dyno.
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2010 Solid Red Z: Mods: Stillen G3 Intakes | BC Coilovers | H&R 20/25 Spacers | Stillen Splitter | Stillen LW Pullie TBI | Red GTR Start | LED Interior | Kenwood Double Din 
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