All I have to say is Holy****! This thing is incredible. I have it set on the highest setting and it comepletly eliminated the throttle lag. It feels like it shifts quicker and going uphill its feels faster. Highly recommend this. On my gen 2 4.7 it feels like a whole new engine. I did not expect this much improvement. It is pricey but I it is worth it.
Just an update after driving with the sprint booster for a week or so. Acceleration from a dead stop is like night and day. Shifting from 2nd to 3rd a lot quicker. Merging on the highway and passing much improved. The gen 2 4.7 was a little soft until 3k. Wish a would of bought this along time ago. Its seems to have unleashed the full potential of the mods I already have. Well worth the money.
One thing when you install this if you take bottom panel off you won't have to unbolt the pedal Assembly. It make it easier. I put it on the highest setting(red) and left it there.