Complex Seven Industries - BMW Aftermarket Performance Parts

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Gain Horsepower
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.

From Our Blog

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4 Tips to Get Your Car Build Sponsored

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You’ve put in countless hours into your car build, but now you need the funds to take it to the next level. What do you do? You can always look for...   Read more

Does a Turbo Blanket's Price Reflect Its Quality?

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If you’ve been shopping around for a turbo blanket, you may have noticed a wide range of prices. With prices ranging from as low as $20 to upwards ...   Read more

Get Ready to Race: Best Tires for Your Car

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You’ve just purchased your car and you’re ready to hit the track – but what type of tires should you buy? Drag racing requires special tire designs and different rubber compounds, so let’s explore some of the best options. Whether you're a drag racing pro or just getting started, you'll find the perfect tire set-up for your car.   Read more

What Piston Material Should I Choose for My Engine Rebuild?

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When it comes to engine rebuilds, there are many decisions that need to be made. One of those decisions is which type of piston material is best fo...   Read more
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