Quote:
Originally Posted by corbs09
Its weird because people have been running JB4s for 10+ years now without much issue if you keep it simple.
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Back in the days yeah, but since 2015 JB4 has not been popular on the BMW Fxx and Gxx series.
I can tell you I am living proof of the garbage JB4 is for modern bmw and its much more harmful than you think. If you lease the car sure you may not see it, but if you planning on keeping a reliable car for 3-7yrs i would not even put a jb4 on my car for free. I've only ran BM3 in my cars since they released to the platform and I can tell you, it puts a smile on my face every time I sit in my car knowing it has a good, solid, BM3 Tune or a proper Custom Tuned done via BM3.