BMS JB4 Tuner G8x M3/M4 S58 Vehicle:M3/M4 Equally at home on street

Equally at home on street and track the BR Series offers the best of both worlds with ride height and damping adjustability

230i 2016 -2019

0 Twin Turbo 07-10

This upgraded inlets is the most cost effective solutions for anyone looking to replace their restrictive factory inlet

BMS JB4 Tuner G8x M3/M4 S58 Vehicle:M3/M4 Equally at home on streetGains are 80whp 100wtq on pump gas and up to 150whp 175tq on higher octane or E85 mixtures. The ultimate tune for your S58 powered G80 M3 and G82 M4, the JB4 allows you to go from factory stock to full race, and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol