ya, i like the set up i have, 40 series flows, or flow i should say(when i got it i
was told not to put true duels cause it would have trouble keeping enough back
pressure, which im douting now after reading some past topics and seeing people
get it that way and speak of no problems) and 3 inch pipe out to 4 inch flow master
echo tips. has a real nice flow sound to it, and loud the way i like it, and so far happy
w the k&n 77 series intake

 

and i'm prob gonna get the hypertech programmer, sounds like i'll really be able to notice the dif. thx for the help

 

travelinman28546, can you adjust your speedo for bigger tire or gears. i've been looking at either superchips or hypertech. i'm debating on which one to get. i want to have the option when i put a lift w/ bigger gears and tires on my truck.

 

another thing to think about is bullydog just came out with a hemi gas engine tuner as well. Might be another option

 

Sorry it took so long to respond man... I have been working my butt off... yeah you can change from stock tires to different sizes.....