I installed it in my 2015 Precept 35UN, 5 speed tranny, Going on a 1300 mile R/T in 3 weeks, will let you know what I think then, I read enough very positive results that prompted me to get the 5 star tune. There are several threads discussing this, Search 5 star.
Read my thread down near the bottom of this forum page, titled five Star failed to load. I'll have more miles this coming Sunday and Monday to see if my opinion changes.
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Nick, Sharon, Abby and Madison (wireless doorbells).