They're crap dude, plain and simple. Even with google you'll find where people have cut them open and what's inside you might as well use an old soda can and some cardboard.'Originally Posted by rmcardle3
This sort of research is what got me to choose Purolator PureOne's. In the scope of things they are a really good filter for the price (even better than the K&N's). Only reason I use the K&N's on my bikes is the nut on the end makes for getting some really odd filter positions easier to work with.
