Don't know but i discovered a nasty little secret about TTS tuners last year when my interface came apart while i was tuning my other bike. It would up with a corrupted map loaded on the bike and it couldn't be ran safely. The TTS marries itself to the ECM and it can't be easily unlocked with any other tuner beside a TTS. Luckily TTS came to the rescue and repaired the broken interface for $100. Excellent customer service. I have the two bike model with the XR and the Road Glide.