I would like to get a new filter when ever I get my pipe and jets. I notice that some people use a K&N and others have a unifilter. I have had neither so dont know much about them. So which one do you guys think is better, alsodo you have to have some oil with the unifilter. I was looking at them and saw that there was a oil for sale with them. I didnt quiet understand that. And if you would kinda explain what the unifilter is that would help. Sorry for the newb question.