[rbarletta11]

For starters, I am very new to BMW/tuning so please forgive any naive questions. I am looking to potentially tune and add a downpipe on 2020 M340i xdrive. I put a decent amount of miles on per year (20k) and wondering if that should change thought process of adding tune to vehicle. I am looking into doing Carbahn stage 1 tune with downpipe. I havent seen any feedback reviews with Carbahn tune, and would be interested to hear thoughts on this?

Also if I got downpipe without tune, what would expected horsepower/torque gain be? I currently have Dinan exhaust and am thinking about adding intake when one is available. Any thoughts and feedback would be helpful