Found this on another site, dunno if still in effect, but if interested it wouldn't hurt to call/write to them...

If you live in Southern California Riverside area. K&N is looking for vehicles for our R&D Dept. to do research and development. Which can be anywhere from designing a new intake and dynoing a vehicle to just bringing a car in for a fitment check. We will need you vehicle for a minimum of 1 entire day or up to 5 days. If you need a rental car we will provide one for you. You must be 27 to qualify for a rental. K&N in return will give you a FREE INTAKE as soon as it is released.
If your vehicle is not on the list you can go to our web site and enter your vehicle info into our vehicles needed area.
If you have any questions please contact me. 909-826-4000 ext 4468 or by e mail at robertc@knfilters.com

Thank You

Robert Canton