SKU: 98063686479

BMS Group 9: JB4 Tuner 2017+ Audi RS3 & TTRS

Sale price$443.04 Regular price$492.27
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

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For Your Every Summer RSVP, with Code: SUMMER15

Description

BMS Group 9: JB4 Tuner 2017+ Audi RS3 & TTRSJB4 Group 9: Power gains of up to 100whp and 100wtq! The JB4 is an easy to install plug and play tuner that attaches to sensors in the engine bay and works with your factory ECU tuning to remap boost, timing, and fueling for optimal performance and reduced turbo lag. Includes full SENT sensor technology required for properly tuning the latest Audi platforms. Includes full CANbus allowing the JB4 to access and incorporate all engine data in its tuning

JB4 Group 9: Power gains of up to 100whp and 100wtq!

The JB4 is an easy to install plug and play tuner that attaches to sensors in the engine bay and works with your factory ECU tuning to remap boost, timing, and fueling for optimal performance and reduced turbo lag. Includes full SENT sensor technology required for properly tuning the latest Audi platforms. Includes full CANbus allowing the JB4 to access and incorporate all engine data in its tuning strategies, incorporate unique safety features such as keeping boost pressure low until oil and water are up to temperature to provide proper engine and turbo lubrication, and drop to a low boost map if the engine starts to overheat, run lean, excessively knock, or over boost. Includes fuel control for ethanol mixture mapping. Fully compatible with the optional wireless JB4PRO bluetooth adapter for on-the-fly map changes, data logging, firmware updates, and much more.

Wirelessly Connect to your JB4: Our all-new JB4 PRO smartphone connection is included to wirelessly connect the JB4 tuner to your Bluetooth 4.0 compatible iOS or Android device. This option allows 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. Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns.

For more information about the JB4PRO mobile app click here.


JB4 Features and Benefits

• 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 free JB4PRO 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

The JB4 is compatible to all the below models and tested in all markets and on all year models.

Audi
• 2025+ Audi RS3 8Y2 Facelift
• 2022-2024 Audi RS3 8Y

 2017+ Audi RS3 8V2
 2018+ Audi TTRS 8S


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.




European and Australian customers must check before ordering.



 

2024 AUDI RS3 8Y JB4 vs Stock


2022 AUDI RS3 8Y, 100% factory with JB4



Audi JB4 Mobile demo video

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: 98063686479

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4.6 ★★★★★
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MJ
Massapequa, US
★★★★★ 5
Stretch out, size down but love the shorts.
Size: 8, Color: Ocean Breeze
Love these shorts. My favorites ever. I always always wear a size 8 in shorts. The 8 fit initially, but stretched out so much, I didn’t have to unbutton them to get them out. I bought 3 colors. I finally bought one in a size 6. Perfect fit, even if they do stretch a little. Returning the unworn ones, and replacing with size 6.
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Reviewed in the United States on August 30, 2025
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Jamie Thomas
Draper, US
★★★★★ 5
Love these shorts.
Size: 4, Color: Jet Black
Five inch for a great mom fit. Cute button closures for the pockets on the back, nice deep pockets. It’s hard to see in the video because they are black but they are the comfiest shorts. True to size. I’m a size 3-4 and the 4 fits perfect…. Even after washing and drying.
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Reviewed in the United States on June 13, 2025
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Tami
West Palm Beach, US
★★★★★ 5
Excellent quality!!!
Size: 10, Color: Ocean Breeze
Wow great quality!!! You get what you pay for that’s for sure!! The fabric is heavy-ish-indicative of quality fabric. Fit is spot on. I’m a barely size 10 (5’6” 160 lbs) and these shorts deliver!! The stretch is just perfect enough for comfort. Excited to wear these next summer!! Will watch for more sales so I can grab a couple more pairs. If you’re on the fence, get them!!
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Reviewed in the United States on December 4, 2025
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JC in NC
Los Angeles, US
★★★★★ 5
Good Quality
Size: 8, Color: Nautical Navy
These are really nice shorts. The fabric is nice quality. They do run a little large.
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Reviewed in the United States on August 27, 2025
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plendy
Carnegie, US
★★★★★ 5
Love!
Size: 10, Color: Sailors Red
The quality is excellent. They are more of a faded red. I ordered a 10 worried they might be snug but that was a mistake. I should have stuck with my normal size 8. (I purchased an Amazon brand of this style that runs small and the size 10 feels more like an 8.) I love the length-not too short and not too long. They are sturdy cotton. There is not any stretch to the fabric. I’m giving them to a friend. I actually tried to shrink them by washing them in hot water and hot dryer but it didn’t make them fit me any better. Since they were already too big, I can’t really say if they shrunk by doing this. They weren’t huge on me before washing and seemed to fit the same way after. I tried wearing them all day and they seemed to loosen up even further. I was continuously pulling them up. I really feel like the sizing is accurate and you can be pretty confident of ordering your regular size. I’ve already reordered the size 8. I’ll update my review if there any issues with that size.
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Reviewed in the United States on July 19, 2025

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