Well I hit 500 miles last Friday. I went to the local muffler shop and they put an single in single out offset 50 series flowmaster with a chrome drop tip and WOW does it sound good!!!Cost was $116 then I went to O'reilly and bought a k&n filter part# 33-2033 which is a 10x10 filter ours is a 10x9.25. They let me test fit it to make sure and man was I happy to see it fit. It takes a little massaging to get it in & latch the airbox but it does fit and it does seal and WOW between the two mods this thing really pickeup up some more ump. Anyway thought i would let you guys know. Oh the filter was $60.