HA!!! I am surprised that he does not have an auction for like 10 of them for like 50 bucks with the description, "GET SO MUCH HORSE POWER AND LOW END TORQUE FROM THIS ONE LITTLE MOD AND SUCH GOOD GAS MILEAGE THAT YOU WILL HAVE TO STOP EVERY SO OFTEN AND ACTUALLY HAVE TO TAKE GAS OUT OF YOUR TANK!!!!"
These people rip off unsuspecting people seeing big numbers for little $.
Stay away, far far away from this and others like it.
P.S. our trucks are adaptive in nature. So if you trick the computer to think it is getting too much or too little of something it will see that there is a problem and eventually correct its fuel mapping to correct for it (provided its not too far out of wack) leaving you with no gain. AND if it is way oout of wack it will throw a code and go into open loop or limp mode and nulify what you did by going to a back up fuel map.
too good to be true, most likley is