Complex Seven Industries - BMW Aftermarket Performance Parts

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BMS S58 JB4 Tuner

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.

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Complex Seven Industries

Complex Seven offers quality aftermarket performance auto parts and accessories for your BMW. While offering first-class customer service, and fast shipping.

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