I have 2 3/4 inch pipe from the cat back with a 40 series flowmaster,i put a iintake from a 01 f150 4.6,it makes a big diff at higher rpms like 3,00 and up, i used the stock intake to make a jimmy rig cold air system to the air bx and took my snorkal out,i have a drop in k&n and a g force maf chip,(that doesnt do anything) i have 30 by 9 bfg's on stock wheels .have a box i built with a single jl and a 550 rms watt crunch amp, 2% tint, white front side marker and turn signal bulbs, looks good not to importish, not sure if i want to level the rear or a spindel lift