Also, when working with the k&n they usually have a outer ring with the filter element in it, then they have a back plate that covers up the large hole left, the screw then goes threw the large plate and sandwiches it down. ditching the stock cage. in my experience with them the outer ring with the element in it is hard to manipulate, making it more difficult than you think to get the filter down inside the box.
foam might rip, but also crushes easier. The hard rubber and metal mesh of the k&n, not to mention the metal backing plate makes it very hard to install in a tight airbox.
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Jack - western PA
2006 KTM 250 sx
2006 EC 200/ 11' style kit--GONE
2004 200 EXC
1997 KDX 220
2004 CRF 250X
1974 CL125
www.youtube.com/allthatstuff35 <---some gasgas videos here
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