Yes, we do have some dyno information. Unfortunately it is not in a form we can easily get posted on our website. The numbers on the 03 TAG really won't impress anyone, as we are only seeing about 5-7hp and 10-15lb-ft from idle to red line. The thing about the TAG is its quicker spool up, EGTs, sound, some mileage improvement especially when towing. Results vary just as the way people drive does so I cannot quote exact results. The TAG is basically enhancement for performance, much as an air intake or exhaust system so its not like plugging in a chip and the dyno does not give any indication of many of the aspects the TAG works on. The thing to do is try one for yourself and give us some feed back about what it does for your truck. If you want to make a trip up, I will install the TAG for free.