2011 5.0 kn filter
A buddy of mine has the k&n cold air kit on his 2011 f150 5.0 for a couple of years now . He has had no issues and he drives from kansas to south dakota quite frequently.

No more perf, AND less effective filtration. We use them on Ladas... and well... y'all know how chitty those are, lol.
Vlad
Clean it and install it. Clean out the intake tube if its dirty. After running it for a month check the intake tube. Wipe your finger in it. If its dirty then you know stuff is getting by the filter.
- increases the likelihood of oil contaminating the MAF sensor. *Over time even minute oil contamination decreases power and MPG. When it's REALLY EXCESSIVE it will be intuitively obvious.

. - any increase in CFM comes at the expense of filtration.
. - cleaning is a PITA. *And, Yes, I've done it on MAS equipped vehicles.
. - Motorcraft, OEM air filters ...
- meets|exceeds engine air intake CFM requirements.
- good for 30,000+ miles (depending upon conditions).
- ABSOLUTELY NO possibility of MAF sensor oil contamination.
- dispose and replace maintenance.
AND ... Nothing is *FREE*.
.
Last edited by gDMJoe; Apr 18, 2015 at 12:55 PM.
- increases the likelihood of oil contaminating the MAF sensor. *Over time even minute oil contamination decreases power and MPG. When it's REALLY EXCESSIVE it will be intuitively obvious.

. - any increase in CFM comes at the expense of filtration.
. - cleaning is a PITA. *And, Yes, I've done it on MAS equipped vehicles.
. - Motorcraft, OEM air filters ...
- meets|exceeds engine air intake CFM requirements.
- good for 30,000+ miles (depending upon conditions).
- ABSOLUTELY NO possibility of MAF sensor oil contamination.
- dispose and replace maintenance.
AND ... Nothing is *FREE*.
.
gDMJoe is right. There is no benefit to running the K&N.






