Stock everythingThe thought has been in the past 1.75 inch baffle or less no fueler needed. I would bet that the Screaming Eagle is EPA compliant and the Vance ands Hines are off road use only. Do you have a high flow air filter?
If so then you are definitely going to need some help with a fueler.
The info at J&P cycles where I'm looking just shows 3in. diameterThen find out the size of baffle and less than 2" baffle you should be good to go.......
Just remember that your rear tire and fuel mileage are going to suffer, if you get what I mean....