This is interesting as I was asking the dealer about Fullsac. So there tellin me using his pipes would be ok, but using the TTS tuner might void the warranty and what if you had to get it re tuned somewhere and they don't have access to the information needed? I was surprised to hear from Steve that TTS actually made the tuners for Harley until they had a dis agreement............and now there not good enough? Just more dealer BS I guess.................... 
Yup, TTS was the vendor for the SERT (Screamin' Eagle Race Tuner) for several years before the moco changed vendors for whatever reason. The TTS Mastertune product you can buy today is the very same but now much improved with many new features the moco would not allow TTS to include on the SERT. Moco wants you tied to them and their tech to use the product. That's why so many of us like to be independent and have as much control as possible.
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