2024 X3 M40i Downpipe And Tune

2024 X3 M40i Downpipe And Tune. Replace a faulty catted downpipe with an oem downpipe or upgrade for more. I had h&r springs installed right away, and did a bm3 stage 1 tune.

If you go aa or other gesi catted you don’t need the tune and it won’t stink but why do a downpipe if you aren’t going to add a tune, it won’t do anything. I had h&r springs installed right away, and did a bm3 stage 1 tune.