I found that at 5psi everything was silky smooth but when we bumped the boost to 8psi we had a harder time shifting gears. As for how long the motor last thats a good question. Guess it depends how you ride. Some guys tend to keep the rpms near redline when they should be using the torque now available from 4k.

Had some fun in a yxz on sunday with the boost it team. Crazy machine