SKU: 66144140863

S58 JB4 Tuner for 2021+ BMW G80 M3 & G82 G83 M4

Sale price$361.35 Regular price$401.50
Save 10%

Pay in installments of $100.38 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 27 - Aug 1

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

S58 JB4 Tuner for 2021+ BMW G80 M3 & G82 G83 M4Gains are 80whp 100wtq on pump gas and up to 150whp 175tq on higher octane or E85 mixtures. The ultimate tune for your S58 powered G80 M3 and G82 M4, the JB4 allows you to go from factory stock to full race, and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol

Gains are 80whp/100wtq on pump gas and up to 150whp/175tq on higher octane or E85 mixtures.

The ultimate tune for your S58 powered G80 M3 and G82 M4, the JB4 allows you to go from factory stock to full race, and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune including user-adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol fuel support, and built-in advanced CANbus based diagnostic tools. Installation is easy and completely removable with no splicing or cutting of factory wires. 

For the latest performance results, updates, firmware, and map guide be sure to visit N54tech.com.

Wirelessly connect the S58 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 S58 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.

 



S58 JB4 FEATURES & BENEFITS

• Gains are 80whp/100wtq on pump gas and up to 150whp/175wtq on higher octane or E85 mixtures.
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 tuning software and up to 8 maps for various fuel and modification levels
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• View and record up to 40 different gauges/engine parameters in real-time with the JB4 app.
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip
• Quick Plug & Play Installation
• CANbus OBDII integration offering unrivaled tuning features and performance
• Improved performance over non-integrated chip tunes
• Runs as smoothly as stock, this is how your vehicle should have come from the factory
• Compatible with all driving modes
• Fuel economy unchanged during normal driving
• 91 octane fuel or better required for performance gains
• Not VIN locked and can be removed without a trace and resold down the road
• Includes the rugged JB4 billet aluminum enclosure for protection
• Made in the USA
• Free USA Shipping
• 5 year warranty

S58 JB4 Applications

BMW M3
• 2021+ S58 G80 BMW M3
• 
2021+ S58 G80 BMW M3 Competition

BMW M4
• 2021+ S58 G82 BMW M4
• 
2021+ S58 G82 BMW M4 Competition

 

What is a JB4?

The JB4 is a plug & 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 quickly be 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.  If your looking for S58 tuning for your 2021+ G80 M3 or G82 M4 the JB4 is a perfect S58 engine tune. 

 

 

DYNO



 

G80 M3 JB4 Dyno, 30% E85 fuel, JB4, BMS S58 Intake


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: 66144140863

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.3 ★★★★★
Based on 28 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Suleyka Torres
Omaha, US
★★★★★ 5
Me encanta
Color: Glint Rainbow
Me encanto volveria a comprar
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
Y
Verified Purchase
Yss
Louisville, US
★★★★★ 5
better results
Color: Glint Pink
I really like the packaging; you don't need to open it and spill everything—with a simple touch, you have the product. I love it and would buy it again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
S
Shelby
Boise, US
★★★★★ 2
Not very much dispenses with pumps
Color: Glint Rainbow
This gives out very small puffs of glitter when depressing the pump. The glitter is as expected, but it would be more efficient to just open the dispenser with how little this pumps out. I'll probably just use this for crafts instead of body and hair. It doesnt really stick either because it is a dry powder
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
T
Verified Purchase
Takelia
Boise, US
★★★★★ 1
Not what I expected
Color: Glint Rainbow
Product doesn’t come out like a dust
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
P
Power Adapter
Phoenix, US
★★★★★ 4
Fine, dry glitter in a puff spray bottle
Color: Glint Rainbow
This works well if, and only if, you know exactly what it is and if it'll work for your application. This glitter comes with no adhesive or stickiness in it. It is not like a glitter stick, or glitter makeup. It is dry glitter in a spray bottle. The spray pattern is very narrow, so if you want to spray it onto a piece of paper or you body, it will show up in a clump. It does not have an airy spray pattern. To use this, you need to add some stickiness to the surface you want it to stick to first. Something like glue on paper or some sort of sticky thing on your skin that won't sink in. If regular lotion sinks in, the glitter will just fall off. So petroleum jelly or something that sits on top works best. Also, if you want it spread out instead of in little clumps as it comes out of the spray bottle, you'll have to move it around manually. On some level, to be entirely honest, I'm not sure this application method is better than loose glitter. With loose glitter, at least I can manually sprinkle it and not get a giant blob like with the spray. Also, some little bits get loose with the spray, and loose glitter in a house is just asking for forever glitter. I'm deducting one star simply because the spray delivery mechanism isn't very useful, and can actually be a liability. Unlike some spray glitters with propellant and adhesive that are more like spray paint and have a more spray paint application profile. This manual puff method just doesn't work well with glitter.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026

recommand products