05 5.4 screw w/ AirRaid and SIDO flowmaster ....I tow a boat weighing a total of 3500 pounds...my question is "should I add a program/chip to it?"...something like the hypertech or superchip...or maybe even the xcal2...I am trying to weigh my options and also stay budget minded. I love the truck but I think the shift point are a little wrong and I wish the throttle response was a little quicker...but I don't want to tear anything up either or void my warranty.

 

You can't go wrong with an XCAL2 from Troyer's, definately what you are looking for!