I but K&N air filter in last week now im hearing stuff about a back plate do I need somthing more or can I just remove stock filter and drop in K&N? thx (K&N V&H big shot duals fuel pak)

 

If you have an SE or a Big Sucker backing plate for a stage 1 set up and you bought a round stage 1 equivalent K&N filter, then yes you can just put it on.

 

no stage 1 download just did the mods and put in k&n filter