Where can i find a service manual for my 2003 wolverine? Also what will a k&n filter do for it, anything? Thanks

 

Any dealer can get you a manual, albeit not cheaply.

By itself, the K/N will not do much. A better move would be to convert to some type of clamp on filter, as the factory setup is very bad for leakage. Pro Design, Noss, etc, can supply kits to use either K/N or Uni.