i have the 6spd std cab truck and i am averaging 19-20 mpg. i have an aFe stage two intake that i pulled from my 05 hemi. i have already dry fitted it and the ony adjustment will be to make the air sensor wires longer(quick fix). in any of you professional opinions would it be worth putting the intake on and getting a free flow exhaust like a flomaster 50 or an at 30303xl? i want to see if i can increase my mpg not so much worried about horses at the moment i drive from tulsa, ok to grand junction,co every week. any advice is appreciated thanks