The best wa to save money is avoid k&n filters all together. as long as you've been here you should know they do no good and actually cause more trouble than help. the intake WILL suck in the oil from the filter and the iac WILL get gummed up so you will idle over 1000 rpms. so you will spend more time cleaning it than it is worth. after cleaning my TB, IAC, and intake 2 times i had enough and threw it away and bought a regular paper filter. I dont know why you would want that in your engine compartment. it will suck in warmer air. i thought the thing to have is cold air induction. which is what the stock system is.I will be totally honest with you. I noticed absoluly no change in performance when i changed back to the paper filter. the only thing i did notice is i havent had to take my IAC and TB off to clean them since i ditched it.

but if you are dead set on the k&n filter they do make a filter that fits in the box that is identical in size as the factory paper one.