SKU: 47988044189

Group 8: JB4 Tuner Gen3B

Sale price$216.90 Regular price$241.00
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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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Description

Group 8: JB4 Tuner Gen3BTrue Plug & Play Tuning JB4 Group 8 The JB4 is a plug and play Audi tuner that plugs into easy access sensors in the engine bay and works with your factory ECU 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. Minimum power gains of

True Plug & Play Tuning

JB4 Group 8

The JB4 is a plug and play Audi tuner that plugs into easy access sensors in the engine bay and works with your factory ECU 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.  Minimum power gains of 30whp and 45ft lb on 91AKI/95Ron

Unlike other tuning systems the JB4 includes a fully programmable CANbus system, at home upgradable firmware, and data logging capability. CANbus allows the JB4 to access engine data to take into account pedal input, throttle position, gear, engine speed, air/fuel ratio, fuel trims, ignition advance, knock, and many other factors and incorporate those into the performance mapping. It can also read/delete fault codes, incorporate unique safety features such as keeping boost pressure low until oil and water is up to temperature to provide proper engine and turbo lucubration and drop to a low boost map if the engine starts to overheat, run lean, excessively knock, or over boost.

The default JB4 map1 runs 3psi over stock peak and tuned maps including stock and valet mode can be selected on the fly using a BMS diagnostics cable or JB4 mobile smartphone adapter.  
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. Made in USA. 5 year warranty.

Further information can be found at our discussion forum here: 

https://www.n54tech.com/forums/showthread.php?t=55309

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. Separate JB4 Mobile app purchase also required.

JB4 Features & Benefits

• Minimum power gains of up to 30hp and 45tq to the wheels on a stock vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom tuning software and up to 8 maps for various fuel and modification levels
• 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
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment
• 91 octane fuel or better required for performance gains
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• Not VIN locked and can be removed without a trace and resold down the road
• Made in the USA
• Free USA Shipping
• 5 year warranty

For any VW/Audi sales, support, and technical questions please contact George at [email protected] George is the only BMS representative familiar with the VW/Audi platform.

APPLICATIONS

• Audi 8V A3 2.0T 184hp
• Audi B9 A4 2.0T 190hp
• Audi B9 A5 2.0T 190hp
• Skoda Kodiaq 2.0T 180hp

• Seat Ateca 20T 190hp
• VW Aerton 2.0T 190hp
• VW Tiguan 2.0T North American
• VW Tiguan 2.0T 140kw/184hp
• VW T-Roc N1 2.0T 184hp
• VW Passat 2.0T North American 174hp
• VW Polo GTI 2.0T 200hp


INSTALL GUIDE / JB4 APP

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: 47988044189

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Joe Kool, Sr.
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★★★★★ 5
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Uncle Steve
Fort Morgan, US
★★★★★ 3
Great fabric - pouch too small!
Color: Black, Size: X-Large
First, the fabric used is wonderfully soft and comfortable. It;s the first thing noticed when package was opened. Strange, but the elastic waistband is about 1/2", very similar to a woman's style panty. But it's comfortable and easily acceptable. The main problem is that the pouch that holds your "stuff" in place, is oddly and unnaturally small. Small enough where this average man's "stuff" tends to fall out of the pouch on one side or the other. I sleep in my underwear, and every time I did with these, I awoke with the front pouch off to the side and everything down there was hanging outside of the underwear. They also seem to do well through a wash cycle. However, if the main reason for wearing underwear is to keep your stuff in place, these fail from the beginning. I ordered another brand from overseas, and they had the exact same problems as these! I wonder if that's just how they make them outside of the USA. The Bottom Line? Uncle Steve Disapproved!
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Reviewed in the United States on October 30, 2025
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SareBear
Natrona Heights, US
★★★★★ 5
Premium cotton underwear at a modest price. Highly recommend!
Color: Multicolora6-4 Pack, Size: X-Large
Bought my husband 2 variety packs of these, and they are still great over 2 years in. High quality cotton briefs are breathable, colors are vibrant, and the fit is spot on. A good value at this price point compared to designer brands, and the product overall exceeds expectations in terms of comfort level, durability and appearance.
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mo
Louisville, US
★★★★★ 5
Comfort, Support, and Quality – The Perfect Boxer Briefs
Color: White, Size: X-Large
These men’s boxer briefs are everything I look for in everyday underwear. The fit is excellent — snug where it needs to be without feeling restrictive, and the fabric has just the right amount of stretch for all-day comfort. The material is soft, breathable, and holds up great after multiple washes. No fading, no sagging, and most importantly — no riding up. The waistband is strong yet comfortable, staying in place without digging into the skin. What really stands out is how well they balance support and freedom of movement. Whether I’m working out, at the office, or just relaxing at home, these boxer briefs stay comfortable and keep everything in place. Great value for the price and a dependable choice for everyday wear. I’ll definitely be buying more. Highly recommend!
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MR. T
Dallas, US
★★★★★ 5
Nice underwear to lounge around the House
Color: Multicolora8-4 Pack, Size: X-Large
Nice fit. They hug your thigh and the material is silky soft.
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