Juice Box N20/N26 Stage 1 - F22/F23 228i, F30 320, 328, F32/F33 420i/428i, F10 520i/528, X1, X3 & 2013 Z4 28i

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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.

N20/N26 Stage 1 Applications:

BMW 2 Series:
• 2014+ 2 Series F22/F23 220i / 228i N20 & N26

BMW 3 Series:

• 2012+ 3 Series F30 320i / 328i N20 & N26

BMW 4 Series:
• 2014+ 4 Series F32/F33/F36 420 / 428 N20 & N26

BMW 5 Series:
• 2011+ 5 Series F10 520 / 528 N20 & N26 

BMW X Series
• 2013+ X1 E84 N20
• 2013+ X3 F25 N20 

BMW Z Series
• 2013-2016 Z4 N2

This Product Fits

  • Juice Box N20/N26 Stage 1 - F22/F23 228i, F30 320, 328, F32/F33 420i/428i, F10 520i/528, X1, X3 & 2013 Z4 28i.
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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  • 5
    Really Impressed

    Posted by James J. on 2015 Jul 1st

    I was really impressed by the results of this device. Initially I was skeptical about something that would increase horsepower for such a low price. After reading many reviews, I decided to give the product a go, which I am glad I did. I have had a Dyno or anything other than my foot test, and the torque and acceleration seem to be much higher than the factory settings. The lag is reduced tremendously and that feeling of getting jolted back in your seat almost feels as good as my GTR. The best part was that it was simple to install and completed in 30 minutes. Great product!