Just don't know
#6
K&N's will ultimately flow more air (and dirt). Foam filters filter better.
Unless HIGHLY modified, a foam filter will flow more than enough air for your engine & not affect HP (I have personally tested it on a 400EX vs the stock filter and flame arrestor cage).
Make the choice that works for you. I have a nice new modified engine because of a K&N myself (can't complain too much, gave me a reason to tear the engine open). My new engine breaths thru a stock filter...
Unless HIGHLY modified, a foam filter will flow more than enough air for your engine & not affect HP (I have personally tested it on a 400EX vs the stock filter and flame arrestor cage).
Make the choice that works for you. I have a nice new modified engine because of a K&N myself (can't complain too much, gave me a reason to tear the engine open). My new engine breaths thru a stock filter...