My 2 cents I believe the Blitz is the best in that it flows more air; but I also believe it is the worst in actually filtering. This is now my own opinion ;ask a "crackhead" what he uses to smoke his "rock" a damp sponge or steel wool. I know that in theory the K&N,JWT cleaning kits are dry before you put them on but it is still a damp paper at sometime. Just my ghetto logic 2 cents