I want to add Vance & Hines oval slip-ons to my 2007 Harley Road King. What else do I need to do?? Fuel Pak?? Dyno Tune...or nothing as I ahve been told by some.
If you do the mufflers alone, the injection can handle the difference. If you add changing the air cleaner, this will require the use of an EFI modifier. The Fuelpak will do a fine job in this situation.