If I'm going to upgrade the AC to stage I (along with the necessary fuel management) what's wrong with going to a stage II AC? I realize the stock football cover won't fit a stage II filter.

 

well i am gonna do the same thing. pipes, pc3 and an arlen ness stage 2 ac. i was told that it wont hurt my bike becuse your motor cant over suck air. i did this becuse i like the way the big ac looks. and some of the custom cover are kick butt. i will have everything on in the next two weeks. ill let you know.

 

I've run both and will stick with the stage 1. There is nothing to gain, but it pushes your right leg a little farther away, which may suit you but just plain irritated me. I also found it uncomfortable on long trips.
For me its function over form.

WB

 

Good point I haven't thought about.

 

I have the Big Sucker II w/PC-III. It does get in the way of your right knee a little bit. I don't mind it. I'm ready to upgrade to 98 cubes, so when I do, the motor will be able to breathe better through the BS II. I bought the custom AN cover that is 8" round and chrome. Looks great.

Jake

 

I already run 96", and the stage 1 will take you to over 110". But whatever floats your boat. Like I already said there will not be any performance gains for most builds. Big inch motors are another thing, I havent done any calculations and to be honest I would probably email K&N and follow their advice for any motor in excess of 110".

 

The stage 1 K&N will flow more than you will ever need.