K&N air filters.

[ieatdrt 10+ year member]

A high flow air filter is just a very very small component in the totale package. If you slap an a/f or exhaust or whatever on but neglect other areas you're not going to notice anything. Especially in a truck. I have a 5100lb pickup that i can tell you right now will not transmit any noticeable difference to the seat of my pants even with a 10hp add. If you want performance gains that you'll notice. Intake/exhaust/prog.-chip all together and maybe you'll see a difference in performance and probably economy. It also depends on how poorly designed the part being replaced was in the first place. If you're not going to upgrade everything then don't bother with just an a/f save your money.

 

[Silver 10+ year member]

I'd say BAD for K&N. The oil gets stuck on the air sensor and gives false readings. Thus shitty running car. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[deadboi77 10+ year member]

Isnt a bad valve that causes oil to get into the air filter compartment?

 

[carguy83 10+ year member]

nah, it's the actual oil on the filter itself. sometimes of the filter is oiled excessively, it can get sucked into the MAF and possibly damaging it.

 

[ighettoboyi 10+ year member]

this is all assuming you have a MAF sensor......do you? That's why my filter uses a silicone tackifying agent //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif