The original air cleaner hits the inside of my upper calf just below the knee (front controls on bike). The blue arrow shows the inside edge of my knee several inches from the tank, which really makes my knee ache. It doesn't like to bend that direction.
With the K&N 63-1130 filter my knee can hug the tank and doesn't get shoved out to the side. And if you look close you can tell the brake peg is in the middle of my foot now with the K&N filter rather than off-center.
K&N has it on their website for $170, down from $299. I tried to order it from local HD dealer, but the best they would do was $240. They understood why I ordered from the manufacturer. Shipping was 3 days.
K&N 63-1130 Air Intake, Performance Products
They claim 6.66 hp increase, actually guarantee it if you want to get a dyno test before and after. I'm not about the power and so can't say for sure, but there is definitely a deeper rumble when accelerating in higher rpm. I am also not about loud bikes, (I still have the original muffler), but I am appreciating the fun of adding a little rumble.
Installation was easy. Remove breather hose, then 5 bolts/nuts, then reattach breather hose and two bolts for the mandrel. They even included loctite.
Bottom line--I felt compelled to get it, so my knee wouldn't hurt while riding with my front controls, and now am so glad I did this. If I still had mid controls, I think I would still love this air cleaner for $170. (not sure about $300)
I like the way it opens up the view of the middle of the bike.