I don't know...My 1st question really should have been....
Does your 2006 have O2 sensors in the header pipes. (They will be close to the cylinder head)
How do you know that you do not have a Power Commander? Asked previous owner or checked the ECM/ under seat?
I just posted a pic of my bike on the sticky "Let see them Softails".
Can you tell from that pic or should I be looking on the other side of the bike?