Derringer® High Output

Derringer

Noticeable improvement to performance without any issues so far. Combined with Ram air intake and Ram air inlet I see a better "under the hood" sound, significantly better throttle response and a mild mpg increase. Setting 2 claims better fuel economy and I have seen it. Setting 6 is for traffic tickets and burning through DEF. Lol

Love this upgrade

Highly recommended

Install was not difficult. Just follow the well written instructions. As others mentioned it certainly wakes the truck up. Combining the Derringer with the pedal monster is a great combination. Just find the right combined settings for you driving style and you will not regret purchasing. I have made several trips and checked the fuel mileage manually before and after the install. There is a small improvement in some driving situations but given the significant increase in power I am pleasantly surprised there has been no decrease in fuel mileage even on the the higher levels. If you are looking for fuel mileage gains you will be disappointed but if you are looking for more power and making the truck more fun to drive you will be very pleased with this purchase. There are no negatives in my opinion.