You are better off modifying the stock box for airflow than spending money on a new filter. I have the K&N on my wifes quad, wasnt worth the money. Most people snorkel, because they are mudders. I just drilled the hell out of my airbox top to allow more air flow since I dont do deep water or mud. That allows more air flow, and there is a muffler mod that opens up the exhaust too. More intake and exhaust equals more flow, and a bit of rejetting is required. This can all be done for free, and is a good noticable mod.
Damn, this is a great site for info!
Our club, CMTRA,,fightin to keep our trails open!
http://www.cmtrail.org/06 AC 400 auto FIS LIME GREEN. Speedwerks full kit with a few other mods
Color matched SS106 wheels and rear rack,no front rack
07 AC 650H1 Lime workin on mods now.
02
KTM 520 EXC Unfortunately,,we have to comply with designated routes,,no more free for all, dang it!!
http://staythetrail.org/