K&N Cold Air Intake System: High-Flow Air Filter, Increase Performance & Towing: Compatiable with 2007-2014 FORD/LINCOLN: Expedition, F150, F150 SVT Raptor, Navigator, 57-2575

I installed this on my 2010 Navigator in about an hour. The instructions are pretty decent, but I would always recommend watching the install video on K&N's site.As far as performance, it definitely seems to have added a bit more power, and mileage is either the same or slightly better (around 18.5 mpg @ 75 mph). I like how K&N actually has a money back guarantee if there are no power gains. The other added bonus is the sound under heavy acceleration. There is almost no sound difference under light driving conditions, which is perfect for the Navigator. There also isn't that highway droning sound you tend to get with a performance muffler.The only negative is that the tube is plastic instead of metal. It's not a huge deal, but I've had other K&N cold air intakes that were metal. Also, the engine cover does not bolt back over this which would have been nice.One thing I was never clear on is the difference between this and the 63-2575. I asked K&N's chat and they said they were the same, just this one is California compliant. They really were no help. The dyno results that come with this are from the 63, so it could just be that the 57 is the newest version.

Product was easy to install, it arrived extremely late. This product did not improve my gas mileage even after I had my system cleared and tuned by certified mechanic. This product did increase my air intake which did increase my horsepower and speed. It sounds cool as well. I’m generally happy with product however in order to be honest I have not seen an improvement in gas mileage in the last 3000 miles on the highway or in town. I have noticed a more efficient working engine. As per the computer.

Easy installation, but a few things could be better. First, the air box top has many gaps and holes they allow excessive heat in. I solved this with some foil tape. Secondly, the hole the filter and intake tube go through on the air box top is far to large for the supplied gasket to seal. I solved this by inserting a length of silicone hose i had laying around. I feel a big name like k and n should have put more effort into the overall design. With that said, it functions as intended. Looks good, and makes fun noises.

WORKS GREAT

This was a very easy and fast installation. The directions were straight forward and all the parts fit as advertised. The result was a much faster throttle response and a small bump for the better in gas mileage. Great product!

after researching for hours and reading mixed reviews i decided to wing it and buy this. I have a 2010 f150 crew cab with the v8 5.4 3v motor.I have the truck running a custom tune. I installed the intake in about 1.5-2 hours taking my time. If you are wondering if you will be able to hear the intake the answer is yes. No you wont hear it when you start the truck and idle or even gas it but when you get on the highway and need to gas the truck the intake makes the truck sound like it has a mild exhaust. I can hear a nice roar and you can definitely hear the intake breathing in air on the highway with no issue, especially if you floor it after the exit ramp. Watching videos on youtube trying to obtain how this will sound will not work. JUST BUY IT!!!! you wont regret it.I have not had this on long enough to really determine if i am getting better mpg or not but at the end of the day its only a bench mark and really not even worth discussion. you will NOT notice 4+ mpg or even +2 mpg on this, its just simply a intake system which allows better air flow vs stock allowing the engine to breath more. When empty , fill up the tank. 🤙

Looks and sounds a ton better than the monstrosity the previous owner of my truck created. The actual assembly took longer than installation, just requires patience and putting the airflow censor on correctly. I would recommend.

High price for cheap Chinese quality. Screws easily stripped. Fit is about 1/4 inch off. If I wanted all this problem, I would have just bought me a cheap one from Ebay.