For the sake of offering another brand that works well. CobraUSA | Performance Motorcycle Exhausts | Fuel Management Systems | Made in America
Cobra makes awesome exhaust for Harleys and sells matched fuel tuners that will be preset for your combination of bike, exhaust, air filter and expectations (power vs mpg).
Give 'em a try. I have the Cobra Longshots and the Cobra Fi2000 tuner on my 2006 Streetbob along with a Kuryakin Hypercharger w/K&N high flow filter.
The Cobra Auto Tuner is a little more pricey but is supposed to be the cats... like I said, I went with the cheaper Fi2000.
I should mention I went with the Fi2000R CL (closed Loop) for use with O2 sensors. That is the way you would need to go.
They have since changed the name of the Auto Tune to Power Pro. CobraUSA | , Motorcycle Fuel Management