2007 Ultra choices are:

1 5/8" tall rk-3909

or

2 1/4" tall rk-3910

The bike is listed on both user sheets, I want to keep the original cleaner cover. Thanks in advance!

Paul

 

I have the 3909 on mine. It has all the flow you'll need unless you go big inches.
On the other hand, if sticking out an extra 3/4" doesn't bother you, why not go
for it. It certainly won't hurt anything.

 

Hey pk , the rk3909 is known to work very well.
I would think the taller one would put the air cleaner lid even further out than it already is.
I'm not bow-legged and as such would tend to stay closer to the engine with the air cleaner.
I run the Ness big sucker stage 1 (with stock cover), which would be about the same out-set as the rk3909.
The Ness , SE Harley , and the rk3909 all work way better than the stocker , performance wise.
Hope this helps.
Mick

 

Thanks fella....3909 it is!

Paul