Review on Boost Horsepower with K&N Cold Air Intake Kit for 2005-2008 FORD F150 (57-2572): 50-State Legal and High Performance by Benjamin Robinson

The installation didn't go too bad. Got it done in about an hour, except I spent an extra hour trying to figure out which MAF adapter they were talking about. The adapter part number is #21515. Luckily they sell it with Prime so I paid an extra $15 to get the part I wanted without having to return the whole damn thing. Perhaps Revain would be kind enough to credit my order as the part must be included.