4.0 engine mods?
I am trying to figure out what engine mods i can do to get maximum hp/tq gains. I have already added flowmasters, AEM bruteforce CAI, and a superchips flashpaq tuner. I am still thirsty for more power though, I plan on putting HFC's and a 3" pipe from the headers back on soon, along with new headers. what else can i do to give me more power? Thanks guys