Yallo, so I have a 03 GMC Sierra 1500. I have Cherry Bomb exhaust, Superchip Flashpaq tuner (performance), Intake so far. my further mods will be; throttle body spacer, flowmaster super40 muffler (3" duel exit), BlackBear tune and a JET mafs. What I wanna know is how much I will benefit from UPGRADING mods. If anyone thinks I should do anyother mods such as headers, MSD, or cam, larger throttle body and thinks its not a waist of money since it is my dd then please spell it out. I do plan on lifting it and bigger tires so the added power will be nice since the tires will add more rotating mass.
Thanks in advace for all your help.