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I bought an AN big sucker. I have the stock breather sitting around doing nothin...

 

If you are using the stock FLS base plate and air filter you may need to use the Screaming Eagle stage 1 filter base and air filter. The SE air filter eliminates the plastic part shown in the above pictures

 

I picked up the full assembly from a crossbones for $25 in the classifieds section here and I only wanted the cover. There might be a few more there but shipping might be a it steep.

As mentioned already, if you get the Screaming Eagle Stage 1 kit you can put just about any cover on.

 

I have the stock Ac off of my slim if interested in buying.Never used.I had the screaming eagle heavy breather put on when I bought the bike.