The LFX platform continues to prove why it’s one of the most underrated V6 setups when done right—and this 2017 E39B is a perfect example of that. This build came in already a solid base, but like most factory setups, it was holding back a lot of potential. The goal wasn’t just to make more power, but to unlock a sharper, more responsive driving experience while keeping everything clean and usable on the street. We started with the essentials—a full exhaust system to improve