Reviewed By Thomas X (Lutherville, MD) Reviewed for a 1991 Toyota Celica —9/26/2007 5:26 PM
I've purchased 2 K&N Air Filters from AutoAnything. The filters have increased gas mileage in both vehicles. The most significant difference was demonstrated in my Altima with the combination of the K&N filter and a reduced back pressure exhaust system. You can feel the difference in performance and I increased city & highway gas mileage by 4 mpg! And the filters never need to be replaced!