mine is rated up to 800 cfm. i know i will never need that. unless i start hangin' with phil.

 

On my road king I went with the K&N 3909(?) which allows me to use the football cover, or any cover that will fit accordingly. On my dyna I had an open a/f, and when it really rains, it started sucking water and sputtering. You also have to cover it when washing. So, for now I'm satisfied with the K&N.

 

I had the K&N 3909 kit and had a oil leaking problem. Switched to a Big Sucker 1 and the problem is gone!

 

didya put the spacer washers in?? I have had no oil probs. On an 06 there's a spacer that goes between the a/f backing plate and the breather bolt that goes into the head.

 

Iam by no means an expert either but my take on the issue is based on the quality of the product as well as it's ability to breath. The K&Ns hold up for ever and are replaced if they degrade (at least the one for my truck was). Their cfm numbers are good so I will keep it simple and go w/ the K&N that replaces the SE stage II.

 

I had a K+N on the last ride, it dripped oil, but the vent tubes dumped out below the intake. I went for the SE air cleaner and backing plate so I wouldn't have to oil the element, and the vent tubes exit above the intake, so hopefully any drips will run down into the TB. I didn't get the AC on in time to do a lot of riding before the snow came, so I can't report on long term use. I reprogrammed with SERT and opened up the mufflers a bit and it runs good. Here is a link to the post I did with pix about the install.

https://www.hdforums.com/m_2675768/tm.htm

 

I just put my new K&N on and put 70 miles on it. Bike seems to run better w/ it. Considering the SE filter'spaper element was disintegrating it might have been too lean[:@] Whether you like to oil or not the quality is night and day. JMO