Is as described. Install took about 45 minutes and is fairly simple with any mechanical skills at all. The new intake doesn't just drop in with no effort but it really isn't that bad with the help of my son to hold the light. Don't know about gas mileage since I've only ran 1 tank of fuel through it but it did go up a 1/2 mpg on the dash computer. I am also running #1 diesel so the true test will come when spring arrives.
2015 F-250 6.7 Diesel
In the end everything turned out fine, however things would have gone MUCH smoother if Volant had either printed instructions or video instructions via YouTube. Their website was useless, as was their YouTube channel. In the end I figured it out and everything went well. The entire front grill comes out (just like during a headlight change). I was slightly disappointed in the performance / sound increase from the 6.7. After ready so many reviews perhaps my expectations were too high.