n54 boost box N54 JB4 BMW Performance Tuner
SKU: 28915625552
n54 boost box

n54 boost box N54 JB4 BMW Performance Tuner

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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 4 - Jul 9

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Description

n54 boost box N54 JB4 BMW Performance TunerN54 JB4 BMW Performance Tuner How about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild. In addition to several

N54 JB4 BMW Performance Tuner

How about up to 80hp to the wheels (100hp crank) on a completely stock car, up to 160hp to the wheels on factory turbos, or up to 350hp to the wheels on a fully modified car with larger turbo(s)? The JB4 includes a simple plug and play installation harness and is compatible with all ECU versions and transmission types. It's everything you need to take your N54 powered vehicle from mild to wild.

In addition to several performance maps which can be selected "on the fly" right from the driver's seat the JB4 includes a 100% stock bypass map, a valet mode, ethanol fuel (E85) support, progressive water/methanol injection support, racing fuel map, an auto-tuning map that adjusts the JB4 mapping to your current climate, octane, vehicle condition, and modifications continuously, and for those interested in an rpm by rpm user adjustable map. Other features include optional in-dash gauges for boost and other engine parameters, a programmable shift light, on the fly adjustable torque limiting to aid with launches at the track, an optional 2STEP rev limiter & no lift shifting for manual transmission cars, an optional speed delimiter, and much more.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. As you decide to modify your car further the JB4 is set up to grow with your vehicle. Whether you're racing a 100% OEM car on pump gas or a 700whp single turbo drag queen, the JB4 has the perfect mix of performance, features, flexibility, and support to ensure your car performs to the best of its potential!

Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. Both options allow you to record and analyze vehicle and tuning data, change JB4 performance maps, and update JB4 firmware as we release free newer versions with updates, more powerful maps, and new features under development. A separate JB4 Mobile app purchase is also required.

Note: This item is not CARB (California Air Resource Board) exempt and is not legal for sale or use in the state of California.

Click here for the latest N54 JB4 firmware, map guide, and details.

N54 JB4 Features & Benefits

  • N54 Power gains of up to 100hp and 100tq to the wheels on a stock vehicle
  • Improves 0-60 and quarter mile times.
  • Includes multiple tuning maps for different fuel types.
  • Quick plug and play installation.
  • Supports E85 ethanol blends.
  • Reads and deletes fault codes.
  • Displays and logs up to 40 engine parameters.
  • Boost by gear control for improved traction.
  • Controls exhaust flap operation on supported vehicles.
  • Compatible with the JB4 Mobile app.
  • Offers better performance and safety than basic chip tunes.
  • Full CANbus integration.
  • Runs as smoothly as stock.
  • Compatible with all driving modes.
  • No impact on fuel economy during normal driving.
  • Requires 91 octane or better for performance gains.
  • Not VIN locked and fully removable.
  • Includes billet aluminum enclosure.
  • Designed and assembled in the USA.
  • 5-year warranty.

Vehicle Fitment

BMW 1 Series

  • 2008-2010 E82 BMW 135i Coupe
  • 2008-2010 E88 BMW 135i Convertible
  • 2011 E82 BMW 1M

BMW 3 Series

  • 2006-2010 E90 BMW 335i Sedan including xDrive
  • 2006-2010 E91 BMW 335i Touring including xDrive
  • 2006-2010 E92 BMW 335i Coupe including xDrive
  • 2007-2010 E93 BMW 335i Convertible
  • 2011-2013 E92 BMW 335is

BMW 5 Series

  • 2008-2010 E60 BMW 535i Sedan including xDrive
  • 2008-2010 E61 BMW 535i Touring including xDrive

BMW X Series

  • 2008-2010 E71 BMW X6 xDrive35i

BMW Z Series

  • 2009-2016 E89 BMW Z4 sDrive35i and Z4 sDrive35is

What is a JB4?
The JB4 is a plug and play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance through these connections making your vehicle much faster. While it's not the only tuning system that operates this way, the JB4 separates itself from the competition with much more advanced connection points and processing, including CANbus, fuel & spark control, Bluetooth to your smartphone, and a variety of innovative and advanced features not possible with any other system. BMS regularly publishes free mapping and firmware updates adding performance and features as ongoing development allows. In addition, the JB4 system is not VIN-locked to your vehicle and can be quickly removed and swapped between cars or resold at a later time. Often imitated but never duplicated, the JB4 has been the gold standard in plug and play turbocharged performance tuning for over a decade.

Is the JB4 a real tune?
Yes the JB4 is a real tune. By tapping into specific sensors and CANbus for real time vehicle data the JB4 is able to alter your boost, timing, AFR, and/or fuel trims, to a similar degree an ECU reflash would, but without the vehicle ever knowing its been tuned. The result is safe, smooth, and significant power and torque gains while retaining your factory safety systems and without having to unlock/flag your ECU.

DYNO RESULTS

Stock, JB4 on a completely stock automatic 135i, on 91 octane

JB4 on an automatic 335i with Exhaust and BMS intake, on 93 octane

JB4, Exhaust, BMS intake, BMS Flash, on 50% E85 fuel

JB4, RB Hybrid Turbo Upgrade, Exhaust, BMS intake, BMS Flash, BMS Methanol Injection, Larger Intercooler, on 50% E85 fuel

JB4 Optional Phone Software

N54 JB4 Install Video

JB4 135i 335i Steering Wheel Controls Demo Video

JB4 Optional In Dash Boost Gauge/Shift Light Demo

JB4 Optional Startup Gauge Sweep
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 28915625552

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RV
West Palm Beach, US
★★★★★ 3
Deceptive advertising - NOT 100 servings
Size: 1.4 Ounce (Pack of 1), Size: 1.4 Ounce (Pack of 1)
The bag shows 100 servings per container, which is one of the reasons I bought it, but it’s more like 30 servings. The bag shows serving size 1 scoop approximately 1g but the directions says “sift 1.5 tsp” but the scoop included in the bag is 1/2 tsp (it would take 3 scoops to equal 1.5 tsp). The taste is a little off, not as smooth as other brands I’ve tried.
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Reviewed in the United States on February 17, 2026
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Amazon Customer
Fort Morgan, US
★★★★★ 4
Best of the best
Size: 2.1 Ounce (Pack of 1)
I always get this one. The best color,taste and no clumps! Wish it was not so expensive but you do get 4 oz.
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Reviewed in the United States on April 7, 2026
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robby71a
Port Orchard, US
★★★★★ 5
Smooth creamy and delicious
Size: 1.4 Ounce (Pack of 1)
Great stuff. Healthy tea option
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Reviewed in the United States on May 2, 2026
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Virginia
Port Orchard, US
★★★★★ 5
Outstanding machine with loads of uses
Color: Black, Color: Black
First off the TLDR: If you have an espresso machine, buy this. The Maestri 4 in 1 is a solidly built little machine that I truly enjoy using. It has a one piece stainless steel pitcher that is dishwasher safe and the spinner has a removable metal frother. So the only plastic touching your beverage is the small plastic spinner. As of January 2026, there is a coupon for $20, off making it $48 and for this price it simply cannot be beat. Now, if you’d like to know why I bought this over the Velvitiser read on. This is meant to be detailed and helpful for those looking at these two machines or wanting to get the most out of this one. First, cost did not really factor in. I mean I’m not looking to get ripped off, but I would rather wait and save for a superior machine, than purchase an inferior one that I will be unhappy with and is likely to break on me. Just getting that out of the way. Also I looked at the new hot and cold cocoa maker that comes with the hot cocoa mug and the iced chocolate milk glass, as well as a starter kit of 10 cocoa pouches, 5 hot and 5 cold. $179. So why did I get this instead? 1. The Velvitiser, while a beautiful machine (and it is pretty) uses a proprietary hook type spinner to whisk the cocoa while it heats it. Because of this, it is designed to be used with their proprietary hot cocoa packets, which is why 10 are included. You can upgrade to 40. And of course more are on the site. There are also subscription options. However this unit was specifically designed for the cocoa butter content, size of granules, and melting point of their chocolate, you cannot use ANY OTHER chocolate, powder, matcha, etc with it - and doing so VOIDS your warranty. Now people have done it, mostly after a year when the warranty runs out. But they risk burning out the motor. The Maestri on the other hand can use just about anything. As long as you don’t drop a whole azz bar of chocolate in the thing, you’re golden. So far, the chocolate I’ve used is: Cocoa powder, Ghirardelli Sweet Ground Chocolate, and Ghirardelli white chocolate which I grated. They worked beautifully and the drinks were delicious. Also, unlike the Velvitiser, “based on the Aztec Molinillo”, I can grate and use Abuelitas Mexican Chocolate. Take that! Also, this machine goes beyond chocolate, see point 3 for other options. 2. It only holds 8 oz. Well technically 9oz but it counts on 8 oz of milk and an oz of chocolate. Hope you’re not married. Or have a boyfriend. Or a big mug. I wanna make a hot chocky for hubby and me. If I’d gotten this I would have had to make the first mug, give it to him, refill with more milk, more chocolate, and wait for the machine. And let’s be honest, by the time my mug was ready, his would be empty. 😩 The Maestri holds two cups or 16oz, and if you pour that into the pitcher you are still well under the Max Fill Line. It’s plenty to share or for my biggest mugs it’s also great when I make iced drinks or soup which brings me to 3. The Velvitiser was very limited. I had my choice of hot cocoa or the next big thing, COLD cocoa newly introduced in September 2025. That’s it. And I hope you like their flavors cause they are your only options. Now I’m not gonna lie, they look delicious. And they almost had me with the banana milk. But they are clearly operating on a subscription model here. Also, I wanted more options. So the Maestri whispered cold foam and here we are. I’m glad I went with this because yes, the Maestri 4 in 1 will do cold foam. It will also do all kinds of cold drinks. If you have an espresso maker buy this. I should probably put that at the top. Mix any of your syrups or sauces with milk and hit the first button (snowflake). Cookie Butter Milk. Hazelnut Milk. I will buy banana syrup and have Banana Milk (I hope it tastes like Banana Runts), And you can use it to mix up your morning protein shake, as long as it’s not super thick (this is not a blender). I make protein coffee so this is a HUGE step up from my old crappy shaker with the little wire ball in it. Of course you can heat and foam your milk for cappuccinos and lattes, middle button. But I also take out the foaming ring and use that setting to make veggie broth, miso soup, and vegan ginger chik’n broth. As long as you don’t have veggies or other chunks in there you can heat up/cook any clear broth. The last button is the Cocoa button. I’ve made tons of stuff with that. Hot chocolate, mocha, golden milk, matcha, and even chai. Be sure to heat your water and milk using the machine, then steep your tea. Remove your tea bag or loose tea and spices before you run the machine again to add your sugar. None of this was possible with the Velvitiser. This machine looks nice on my espresso bar, I like that the pitcher is held to the base magnetically. I love how easy it is to clean. But most of all I absolutely love how versatile it is. I’ve only had it a short period of time but it has become central to my drink making. I use it each morning for my espresso, I use it to make an iced drink at some point during the day, and it’s winter so I am using it to make a broth most days as well. So yeah, glad I went with the Maestri 4 in 1. It’s my favorite new addition to the espresso station.
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Reviewed in the United States on January 18, 2026
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JF
Boise, US
★★★★★ 5
A terrific frother and steamer - quiet, stylish and affordable!
Color: Black
This is an excellent frother steamer! I got the black model - it is stylish, quiet, and everything works as advertised. It is very quick and convenient to use, and has definitely enhanced our coffer experience. We are totally happy with it!
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Reviewed in the United States on April 9, 2026

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