I just got a new 2011 FXDC. All stock; I plan to replace the stock muffler with Supertrapp Internal Disc Series slip-ons 628-78088 (I think that is the part number for 2011 FXDC).

1. Do I have to get a fuel mgmt system such as Power Commander or Fuelpak when installing the Internal Disc slip-ons?

2. If I replace the stock air filter with K&N air filter HD-9608 and install the Internal Disc slip-ons, do I have to get a fuel mgmt system?

3. What is the quietest set-up for the Internal Disc slip-ons?

4. Are there any other Supertrapp models that I should consider for the nice deep thumping sound (but not too loud)?

Thank you.