In my opinion, if you're doing any real motor work, just flashing a download from HD isn't going to cut it. Rear motor work should be properly tuned... SE Pro tuner, Power Vision, TTS Mastertune... any flash tuner.... I've never been a fan of piggyback style tuners because I've seen them crap out and then you're shit up a creek. If you're going to put the money into it... do it right so you get the most, power, performance, and reliability...
Shiny and New '16 FLTRXS
Harley Davidson Arizona Proving Grounds
Mech Level 1