well what do you guys know about foam filters? we are a dealer for UNI and K&N at work and i already got the K&N, just cuz i had to scratch the itch, lol. but what about running a single or dual layer (density) foam filter? i know several people who race pro and they run foam, they say it flows more, i guess thats why you dont see it on the street? well do guys know how foam and cloth (K&N) compare?