2019 max R turbo
I've been searching for a way to improve my commander/rotax for a while. Then I found a engineer (not mechanic) in Az that knows his stuff. I recently added biggger valves ported head and 12:1 piston to my commander but the performance was good but not what I expected. So the engineer started to build a new intake system for it and all I can say is WOW. He replaced the Y manifold with his own individual intake system for each cylinder (similar to the Mav but better) and now he has designed a new air box. I will post later the dyno improvements over stock so far. The mav intake just like the commander will need to be improved if you want more power. I'm going to have the same system put on my mav as well. He told me that the exhaust headers suck on the mav and commander as well and matching a better header on the stock mav/commander muffler will further enhance this motor. This is an improvement over a Welller intake system not stock. btw it is still not done more to come.