Since I was installing a complete Raptor exhaust system on my 2016 F150 XLT, I decided it would be the right time to use the Corsa resonator delete x-pipe. Installation was easy and I really like the new sound. I think I may have even picked up a few extra horse power. Mileage did go down though because I get on it more now to enjoy the sound. No drone and hardly noticeable when cruising but speaks to me when I get on it. When driving properly, I think the mileage did get better though.