Getting here.Ive got a 09 Honda 400ex with the airbox and lid. Id originally thought about just cutting out some of the interior plastic and adding a bigger air filter,but then I saw that k&N has an air filer for 6x the cost of the regular. My question is - Is it worth the cost to switch from the foam air filter to the K&N- keeping the same Air Box?
Worth the cost for a K&N over the standard air filter?
Will I get any better performance?

Thx-