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Burger Tuning S58 JB4 Tuner for 2021+ BMW G80 M3 & G82 G83 M4 with Wireless Mobile Smart Phone Kit (Wireless Connection)
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, ...
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