I have S&S slip-ons and Ness big sucker on my '08 Fatboy.  After the PCIII was ditched and Scotty weaved his magic with the TTS the bike is now better than ever.  The bike is much more ridable and feels a lot quicker seems to have more bottom end. 

This combo will do before I want more power and crack the engine open.

Chromer, if its me I wait till I have the bike before I get parts for it. Harder to lose doing it that way.

Not Scotty but the TTS unit is for all Delphi equipped HD bikes, not model or year specific.