I know there have prob. been numerous threads about mods for the 3.9L V6 but let me see if I can put a new spin on it. I have a 2000 with the 6 and so far I have a airaid intake with a catback dual exhaust. My question is this as far as money versus hp gains what is the most cost effective while giving me the most gains. I know I have alot of options but which is the best when it comes to hp versus cost.