I am getting a K&N CAI soon so I don't need the air box. What is the difference between the lightning headlight trim and the XLT headlight trim?

So you are saying that I could get just the face and it will work with my 90mph non-tach cluster, because that doesn't sound right. However I have heard of guys taking the gauges out of a 93 lightning cluster and putting them in their 94 XLT cluster.