I have decided against the fatshotz and have ordered a set of fatshots with the closed end cap. On a 2004 Screamin Eagle Electra Glide with a 103" engine with Vance and Hines Dresser Dual headpipes and high flow AC, so how many discs do you think would be good to start with.

Also I will be looking to find a comparable power commander map for these mufflers. Any suggestion on what to compare these mufflers to for map selection.