Reviewed By Chris D (CUERO, TX) Reviewed for a 2004 Ford Expedition —6/16/2014 8:19 PM
Reviewed By Cliff S (Albany, OR) Reviewed for a 2004 Ford Expedition —8/10/2013 6:43 PM
I just bought this 2004 5.4L Expedition which had a 59 series K & N system on it, at anything above 900 rpm's it would start this loud squealing and not go away unless you were letting off the foot feed,the car dealer said they could not find anything wrong, I called K&N they were not sure as to why it was doing the squealing, maybe I need to put on a resonator box over the filter so I made one,didn't help. I think the plastic tube was the problem so I bought the 77 series and problem went away
Reviewed By Michael L (Glendale, AZ) Reviewed for a 2004 Ford Expedition —11/28/2011 1:37 PM
The only problem with the kit is that the hose clamp for the support bracket is almost too small and very hard to get on. Also the CARB sticker does not stick very well. It has greatly improved the power output and hill pulling. I am not working the engine as hard as before on uphill drives. Much better than the Airaid kit I orginally ordered that did not match anything on my Expedition and would not mount properly. Looks like K&N has the kit figured out correctly for my year Airaid does not.