I put a set of 2.0 on my 05 Deuce FI and did not require any CPU mods but a friend with an 07 Wide glide did so I am not sure if you will need to or not.
I love the sound and as someone already said they make a great compromise until I can afford a full system. Because of price the full system is slow coming but two years of my Rush pipes with no complaints.
Good luck
Glen

 

Rush way cheaper and down the line you may want a whole new exhaust and rush are dam good I had them on my springer