Great Product - Worth the price to me
This was installed about 2 months and 5000 miles ago and it has performed admirably. I was most interested in efficiency and power increase and was rewarded with both. Acceleration is noticeably improved - 2011 Expedition weighs about 3 tons so it doesn't exactly jump but it does step right out! MPG is up by 1.5 in town and 3+ on the highway. Of note, I had also installed a MagnaFlow Performance muffler which added to the improvements - performance and sound - but the air intake was the key.