It doesnt say anything about it because we are the only company that produces it. It is a Mach Performance kit, using a ProCharger head unit.catfish said:it does not say anything about an application for the 4.3l v6. Why are you choosing procharger over vortec and powerdyne? I think vortec is not intercooled, does that make a big difference. And do you have to do any mods to your engine with the procharger?