Up to 40 Horespower at the wheels with no other modification!

Our entry level / budget tuner, the Juice Box Stage 1 increases boost by 2-3psi and adds 30-40hp to the wheels. There is no better value in N54 tuning. Installs in the ECU area using the included OEM BMW connectors. Simply unplug two factory wires and insert the matching JB2 wires.
Completely reversible, no cutting and detection code free.

Compatible with all ECU versions and transmissions for BMW 135i, 335i, 535i, and X6.

Stock, Stage 1, and Stage 2 on a completely stock
automatic 335i with 91 octane.

Instantaneous increase in Power and Torque for your Twin Turbo BMW!

Works on all USA, Canadian & European models - 2007-Present - Twin-Turbo 6 Cylinder models
Automatic and Manual Transmissions

Click here for the install guide 135 /335