I use this filter on my mod. I've used to used the K&N and I've used paper filters (all kinds). I will tell you first hand I won't use anything but the R2C product again.
1) the K&N are nice but they clog up , are a pain to clean, and a mess to oil and I used to wipe the dirt off the inside of the carb, (how much did my engine eat?) I also greased the filter tray top and bottom to stop the dirt. So combined with cleaning, clogging, and still getting dirt in. NO THANK YOU
2) the paper filters are easy just put it on and run it but a new on every week and you still have to run and clean the prefilter. NO THANK YOU
3) foam great for a dyno run in a controled environment with no dirt & no oil, BUT put them on your car without oil and you might as well not run a filter at all.
4) R2C put it on run it take it off blow it out put it on run it..... It don't get any better than that. THANKS I'LL KEEP IT
Remember the more air you get into the motor the more power you get!
I have NOT been paid for this endorsement!
Good luck to everyone
Chris