I have recently purchuased a 2010 SMC 690 and when i bought it the dealer told me along with the akro pipe and map they put on a better air filter on it. Well need less to say i went to clean it the other day to find out it was the stock paper one. Im not sure which one i want to use either a UNI, KTM foam filter, or the K&N which i am kinda of weary about using on a bike. Also i have heard good things about this DNA filter which i have never heard of. Plus the bike likes to pop alittle bit on decel so alittle extra air to her wouldnt hurt. But what do you guys reccommend im not looking to pull the whole airbox or get max hp out of the bike or anything crazy i just want somthing that holds up good and allows some more air flow to the bike.