The K&N filter I'm using is 9inches long [counting the 1" flange]and 7inches wide[the biggest I could fit in there] I then made my own custom sealed heat shield, so that the filter can only suck air in from the original fender hole and in from around the head light. I also made my own MAF adapter. It works great, after over 30 passes at the track, testing all the CAI's I could get my hands on,as well as testing several of my own design, this setup has gotten me the best times.