Juice Box N55 Stage 1

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Product Introduction

  • This plug and play tuner attaches to two easy to access sensors in the engine bay and works with your factory DME tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. It features a 64mhz processor allowing sensors to be sampled 800 times per second using dedicated 10 bit digital to analog converters, ensuring smooth and powerful performance. The same box automatically detects whether you have an N20, N55, or S55 motor based on the TMAP sensor voltage and adjusts the tuning accordingly.

Power gains on the N20 motor are up to 45 horsepower and 60 torque (35hp and 50tq at the wheels), on the N55 motor are up to 50 horsepower and 65 torque (40hp and 55tq to the wheels), and on the S55 motor up to 60 horsepower and 75 torque (50hp and 60tq to the wheels). 

Installation is very discrete and it quickly removes without a trace when needed. Fuel economy during normal driving is unchanged. Compatible with all driving modes.

Part F30-N55-STG1 is CARB Approved Under Executive Order (EO) No. D-744-1 for 2013 BMW 335i models only. All other applications are competition race use only and not legal for use within California.

  • N55 Stage 1 Applications:

    BMW 1 Series
    • 2011+ E87 135i
    • 2011+ E82 135i
     2012+ N55 BMW F20 F21 M135

    BMW 2 Series 
    • 2014+ N55 BMW F22/F23 M235i 

    BMW 3 Series
    • 2011+ N55 BMW E90 E91 E92 E93 335i/xi
    • 2012+ N55 BMW F30 F31 335i/xi 
    • 2013+ N55 BMW F34 335i xDrive GT

    BMW 4 Series
    • 2014+ F32 F33 F36 Coupe 435i / 435xi

    BMW 5 Series
    • 2010+ F07 535i GT
    • 2011+ F10 F11 535i / 535xi

    BMW 6 Series
    • 2011+ F13 640 Coupe
    • 2011+ F12 640 Convertible
    • 2012+ F06 640 Gran Coupe 

    BMW X Series
    • 2013+ X1 N55 TwinPower
    • 2011+ X3 X5 X6 N55 TwinPower
    • 2017+ BMW X4 M40i 


If you are not happy with your purchase, you may return it for a refund. Returned merchandise must be in saleable condition and in the manufacturer’s original packaging. Returns for full refunds must be made within 15 days of receiving the item; returns made after 15 days may be eligible for a refund minus a restocking fee. This does not apply to defective items that are covered under warranty. No refund will be granted on any part that has been installed, modified or that is not in saleable condition in its original packaging. Special orders and custom orders are not returnable. Shipping charges are not refundable.

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