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can i be added to the spread sheet please, 2004 ap2, 535 hp 400ft-lbs dynapack @ 17 psi, full race gt3076r kit. 3mm ip head gasket, 750 cc injectors, tuned by evans tuning, 3 inch exhaust, thanks
-matt
I think even with SC the 4-2-1 header design is more beneficial in the usable power band over all. I don't have any hard data but my experience with owning many 4 cylinder cars would tell me that the benefit in the amount of mid range power they support out weight the couple top end hp they prevent over the 4-1 design. I had the opportunity to get the Comptech 4-1 header for $200 with my SC purchase and decided that my stock Ap1 header benefited me more in the overall power curve so I turned it down.