They should offer the Z1 intake instead of the manifold imo. That would be right on the money 400hp. It seems a lot of people who install z1 manifold only see slight gains (including myself).
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Stillen G3, z1 Intake Manifold, Stillen Headers, Z1 HFC's, Stillen Catback. 330whp 267 ft- lbs tuned at Z1 motorsports.
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