I installed the BMP Stage 1 (pipe, y-pipe, tune, clutching) when my 2016 Pro-X 800 was new and it has run flawless for 2500 miles. Substantially quicker than my 2017 XCR 800 and a lot more fun to ride. I figured it is time for a top end, so I picked up Stage 3 (adding the billet head, durability kit). Just gas-and-go, I have never had a single DET flash or any other problem with my Stage 1, including gassing up at numerous Michigan UP stations. Does anyone have any experience with the Stage 3's reliability?