Welcome to our Forum David.

On a 2014 FLHTCU or any newer Rushmore model it's not worth it to change to a
Screamin Eagle Stage-I air cleaner unless you like the looks of it. The stock AC is
only a $60.oo K&N replacement air filter away from flowing all the air a Stage-I is
able to use. (K&N part # HD-1614)

If you are just adding aftermarket Mufflers, but not taking the Catalytic Converter
out of the header pipe and adding a Stage-I AC then you should use a Fuel Enriching
Device of some type. At that point the minimum would be, FL-ViED-10 by Nightrider.
The more you spend on your Stage-I setup, the better the performance is not always
case, at the end of the day. Do your research to get the best bang for your bucks for
a Stage-I.

 

...and a new exhaust system or you have a Stage .5

When header shopping, you have choices of 2-1, 2-2 or 2-1-2.

Best performance = 2-1
Best Sound = 2-2
Mix of both = 2-1-2

As far as the slip ons/baffles go, lots of choices there too. I recommend you have the bike Dyno tuned by reputable tuner. Talk with them about the choices and options in regards to sound and performance.

 

Where in Illinois do you live?