F Chassis N55 BMW JB4 Tuner Choose your vehicle:JB4_F10_A • Provides additional tuning flexibility

• Provides additional tuning flexibility

A new E85 compatible Walbro pump

We suggest using the Tial BLACK (6psi) spring based on our testing

Don't let weak and unresponsive factory gas pedal mapping ruin your driving experience

these kits will be built after the order is placed and will ship in 5-7 business days

F Chassis N55 BMW JB4 Tuner Choose your vehicle:JB4_F10_A • Provides additional tuning flexibilityPower gains of up to 80HP on a stock vehicle without the risks of flashing! Ready to take your F chassis N55 BMW to the next level? How about up to 60hp to the wheels (80hp crank) on a completely stock car or up to 100hp to the wheels (120hp crank) on a fully modified car? The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune. Including the ability to enable disable