not saying it doesnt make a diff cause it does you dont loose hp...but for 700+ dollar headers and 400-500 dollar mid pipe you got 20 wheel isnt that much for 1300+ dollars not including labor...im not sayin headers is a bad mod cause ive always done them cause they sound better but for the money you spend on them you dont get very much of a gain....so if you only had 800-1000 to spend on something i would look at other stuff first like intake, dyno tune, gears, suspension, sticky tires, look fast mods....headers was always the last thing i did cause i wanted a complete set up with good sound, not for the power