.....ok so its just a drop in K&N replacement filter ha ha. i need one for my tan truck ....and i dont want to spend a bunch of money on it so i bought that. they are listed around 48 bucks or something like that and one of my vendors had it in stock and gave it to me under what my cost is, so i spent 26 bucks. not bad. Hopefully i get a mile or two better on gas mileage when i tow CAUSE ITS HORRIBLE right now. im towing my red truck up to houston for a huge show this weekend and i need all the help i can get. dyno numbers to come soon ! ha ha