Thanks. I mean, who knew! I never would have thought of adding a 5th injector without having a 5th cylinder for it. I guess you gotta think outside the box. And know something about cars and engines. I may go with this in the future. I've had my GXP for 5-1/2 years and just now getting around to working on mods.This will solve some fueling issues encountered when making more power and it will keep your intake valves clean and prevent buildup.