i was looking into getting headers for my truck an 05 5.3L 4x4 z71 crew cab short box i have a diablo chip airaid cold air and throttle body spacer and i was wondering if headers and true dual exhaust will make a big difference or not and if so how much? i heard that it is a noticible difference but a couple mechanics also told me it wont be noticible
thanks for the info

 

LOOK ON PAGE 4 AND SEE JB 2004 MODS,THAT IS THE # 2 MOD FOR THE
MOST H/P GAIN. WILL COST, BUT A GOOD RETURN. I THINK I WOULD FINE
ANOTHER MACHANIC THAT KNOWS ABOUT H/P.