I have left my 04 PSD bone stock and will for some time. However, I am not as reluctant to go to a cold air intake for the Expy if it makes reasonable improvements in fuel economy. I had no dilusional thoughts that this vehicle would be good on fuel. Just thought a little help would not hurt.
Anyone with experience in this area?
No to K&N look for Volant or Outlaw - Also FTE sponsors.
Look for dry element filters to save sensor replacement.
Over oiling K&Ns are dangerous.
There are dozens of threads about this subject. Try searching out the threads and reading a few.
Make your own decision on what you run/buy.
I don't know, but I have been using K and N filters for the past 15 years with out a problem (so far) including a 5.8 94 Bronco. 100,000 miles still ran fine.
I have one on my 07, If it causes a problem, I will post it here. I have had transmission problems, but that was before installing the K and N air filter.
I have to say that this 07 Expedition is ok, but it is no Bronco. I miss my 94 Bronco XLT 4x4, it was a REAL 4x4 that I could go any where in.
This 07 Expedition 4x4 is made for street, gravel roads / winter snow use only. I think if I went off roading in it I would trash out the underside real quick.
you are correct, no one makes and aftermarket air intake for the 07 08 expedition. Outlaw Power assumed the 07 F-150 intake would fit so I tried it, but it does not, they graciously took it back and paid for shipping, good company and product seemed high quality.
The problem with the 07 expedition is that Ford has engineered the intake to be one piece with the overflow reservoir for the radiator, so the only way to get a new intake in is to cut the plastic air box our without damaging the reservoir. I would do this if I new for sure the new intake would match up with our trucks. By looking at the design of our engine bay and by looking at the design of volant and outlaw power there are currently no intakes that will match up.
I doubt any company will make them, since ford has made it very tough to replace.
I just dropped a K&N filter in my factory intake, I may look at getting a new pipe from the box to the engine.