same experience, the stage 1s rock, bigger sound and with the ECU, perhaps there is some performance.Went for a nice afternoon ride after new pipes were installed! It's not a big change,but you can definitely hear the difference!
Love the sound!
Grabbed some video of the stage 1's coming at going at high speed (excuse the poor take off and early 3-4 shift). They sound pretty good IMO. Of course straight pipes or a good 2-1 setup will likely replace them in the future, I'm pretty pleased with the sound. The ECU reflash is immediately noticeable with throttle response. No more God awful delay on throttle roll.