I have a 2004 FLHTCI with a stage 1 air cleaner, revtech DFO, and V&H Duals. I am looking to pick up some supertrapp slip-ons and can't decide on the 4" megaphones or 3" internal disc. Is there any performance difference between the two?
Also, how many discs would I run in the left/right mufflers with my setup. I assume the left should have fewer discs to make up for the shorter headpipe length in the duals.
Any info would be greatly appreciated! | 
