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Piggyback Tuning Modules
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You've heard about it before, and now it's available here at Turner Motorsport! The Burger Motorsport JB4 Tuner is one of the most versatile, adaptable modifications you can make to your BMW, and among the simplest to install. A true plug & play solution, the JB4 offers support for everything from stock cars to fully built monsters. Stock cars can expect gains of up to 60 wheel horsepower, while modified cars can expect to see gains of over 100 WHP! With an additional cable, you can connect your smart device or laptop to enjoy datalogging and tuning capabilities. It's all inclusive and fully featured - it's the JB4 from Turner Motorsport. Order yours today!
Burger Motorsports Tuning Products are for off-road racing use only - NOT FOR SALE OR USE IN CALIFORNIA! All customers must sign and return an emissions waiver to purchase Burger Motorsports tuning products.
This product was last offered at the strikethrough price on
05-13-2026
This product was last offered at the strikethrough price on
05-19-2026
BMW N54 JB4 2 Step / NLS Relay is a powerful add-on for BMW N54 engines that enables your JB4 to “2-step” by cycling power to the ignition coils, allowing for quick boost build-up even when the engine is not under load. Ideal for both manual and automatic transmissions, this relay is perfect for creating dramatic sound effects and for launching with manual transmissions. Additionally, it provides No Lift Shifting (NLS) capability for manual cars, enhancing performance and shifting speed.