I know that air filter discussions have been going on since the inception of them. But here we go again i just want to know who are if any,are using the K&N air filter on their WR's. I have an oppurtunity to get one for free but i do not want it if it isn't worth it. I currantly using a Twin Air and a No-Toil. I like them both, they work great, just want to know if there is any gain in any areas with the K&N.