Reviewed By James J (Laurel, MD) Reviewed for a 1999 Lincoln Navigator —9/3/2007 4:41 PM
I installed this kit on my 5.4L, 99' Lincoln Navigator. I immediately noticed an improvement in my gas mileage...approximaely 2-3mpg better. I also noticed better performance with towing...the engine breathes better and sounds GREAT TOO.!!