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sometimes, #'s can also drop. take me for example. i had a stainless steel prototype 1 piece greddy header on my car . i dynoed it and made an okay amount of hp. after an hour, i took off the header and replaced it with my stock header. i was suprised to see i gained some torque in the top end. and the hp was about the same. since then, i bought a kamikaze header. rated to one of the best headers for a supercharged engine. this bolt-on added 3 hp and kept the torque at about the same #.
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