not sure about jetting but with the k&ns if it says its for a banshee it will fit all years as long as it has stock carbs. there are two types the one that goes in the stocks place in the air box. or there is a k&n kit that completley removes the airbox and is two diffrent filters, the 2 filters will produce more power but is not recomended for any type of harsh conditions, mudd, water ect. so if your a duner/mx/trail they'll work fine but if you like mudd bogging and water go with the air box kit
hope this helps a little bit