SKU: 91125092340

JB4 Tuner for Acura

Sale price$243.00 Regular price$270.00
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  • CAN

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Description

JB4 Tuner for AcuraGain up to 80whp 100wtq on 3. 0L and 50whp 60wtq on 2. 0L Turbo Acura Engines The JB4 Acura tuner is a powerful plug & play performance tuning system designed for modern turbocharged Acura engines including the Integra Type S, TLX Type S, TLX 2. 0T, MDX Type S, and RDX 2. 0T. The JB4 connects to two easy to access sensors in the engine bay and works with your factory ECU to safely remap boost, timing, and fueling for significant horsepower gains and

Gain up to 80whp / 100wtq on 3.0L and 50whp / 60wtq on 2.0L Turbo Acura Engines

The JB4 Acura tuner is a powerful plug & play performance tuning system designed for modern turbocharged Acura engines including the Integra Type S, TLX Type S, TLX 2.0T, MDX Type S, and RDX 2.0T. The JB4 connects to two easy-to-access sensors in the engine bay and works with your factory ECU to safely remap boost, timing, and fueling for significant horsepower gains and reduced turbo lag.

No ECU flash required and fully compatible with locked 🔒 ECUs.

Installation is extremely discrete and unlike traditional ECU flash tuning the JB4 can be removed quickly without leaving a trace. Your vehicle’s factory ECU never detects the additional boost or power levels. Fuel economy during normal driving remains unchanged and the JB4 is compatible with all factory driving modes.

The JB4 includes a plug & play OBDII CANbus connection allowing it to read critical engine data directly from the ECU in real time including pedal position, throttle position, ignition timing, fuel trims, air/fuel ratio, engine knock, and more. Other tuners without CANbus integration cannot monitor or adjust tuning based on this critical engine data.

Using this advanced data input the JB4 Acura performance tuner delivers huge power gains with smooth and reliable power delivery.

The JB4 also includes multiple performance maps, smoother partial throttle tuning, additional engine safety systems such as lean protection and overboost protection, advanced logging capability, boost by gear control for improved traction, the ability to read and delete fault codes, and ongoing improvements through free firmware updates.

Wirelessly Connect to your JB4

Add the optional JB4 PRO Bluetooth adapter to connect the JB4 tuner to your iOS or Android smartphone. The JB4PRO mobile app allows you to monitor engine data, change performance maps, record data logs, and update firmware as new features and more powerful maps are released.

The JB4PRO app provides a clean user interface with built-in help menus and advanced data logging tools that can estimate performance and help identify tuning issues.

For more information about the JB4PRO smartphone tuning app click here.

JB4 Features & Benefits

  • Power gains up to 80whp / 100wtq on Acura 3.0T engines
  • Up to 50whp / 60wtq gains on Acura 2.0T engines
  • Improves 0-60 times and quarter mile performance
  • Preloaded with custom JB4 Acura tuning software and multiple maps
  • Ethanol (E85) compatible performance maps
  • Read and delete fault codes directly from the app
  • View and record up to 40 engine parameters in real time
  • Boost-by-gear control for improved traction
  • Free JB4PRO smartphone app for tuning and data logging
  • CANbus OBDII integration for advanced tuning features
  • Smooth OEM-like drivability and power delivery
  • Compatible with all factory driving modes
  • Fuel economy unchanged during normal driving
  • 91 octane fuel or better recommended for performance maps
  • Not VIN locked and can be removed and resold
  • Includes rugged JB4 billet aluminum enclosure
  • Made in the USA
  • 5 year warranty

Vehicle Fitment

Acura

  • 2024+ Acura Integra Type S 2.0L Turbo
  • 2023+ Acura Integra A-Spec 1.5L Turbo
  • 2021+ Acura TLX Type S 3.0L Turbo
  • 2021+ Acura MDX Type S 3.0L Turbo
  • 2021+ Acura TLX 2.0L Turbo
  • 2019+ Acura RDX 2.0L Turbo

What is a JB4?

The JB4 is a plug & play performance tuner for turbocharged vehicles. The JB4 connects between engine sensors and the vehicle’s ECU allowing it to safely manipulate boost, fuel delivery, and ignition timing for significant power gains.

Unlike basic tuning devices, the JB4 integrates with CANbus, supports advanced engine safety monitoring, smartphone connectivity, ethanol tuning, and continuous firmware updates that add features and performance improvements over time.

The JB4 system is not VIN locked and can be removed and transferred to another vehicle or resold later. The JB4 has been the industry leader in plug & play turbocharged tuning for more than a decade and is used by enthusiasts in over 67 countries worldwide.

Is the JB4 a real tune?

Yes. The JB4 actively adjusts boost, ignition timing, air fuel ratios, and fuel trims using real-time engine data through its CANbus connection. This allows the JB4 to deliver performance gains similar to ECU flash tuning while maintaining factory safety systems and without permanently modifying the ECU.

Acura 1.5L and 2.0L Install Guide

Acura 3.0L Install Guide

2021 Acura TLX Type S – ~93 octane – JB4 Map2 Dyno Results

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: 91125092340

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Review Dude
Los Angeles, US
★★★★★ 5
#1 for #2's
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
I like the lack of sweeteners and flavor. I just want the stuff that helps me poop. There is some citric acid in it (no idea why) which gives it a mildly acidic taste. Other than that, it does the trick.
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Reviewed in the United States on March 23, 2026
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Strathmont
Birmingham, US
★★★★★ 5
Good Stuff
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
If you need more fiber in your diet, you need this. The price is right, it works very well and keeps me regular. I use this instead of the gummies or capsules. That's because you MUST put in in fluid, and hydration is SO important when using a psyllium product as it causes water to be absorbed very quickly once it is ingested, and you don't want to dehydrate! Mixes very well in water and has little to no taste whatsoever. Stay regular, stay hydrated and stay well.
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Reviewed in the United States on April 14, 2026
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Robert
Alexandria, US
★★★★★ 4
Works well, but is now too expensive...
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
The "No added sweeteners" has been my go-to version of Metamucil, but I'm giving it 4 stars and moving on to another brand as the price is over $35 which is too much imo...
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Reviewed in the United States on October 15, 2025
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S. E. Seater
Louisville, US
★★★★★ 5
I like the mildly tart taste of this unflavored, unsweetened drink made up with water.
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
I like the mildly tart taste of this unflavored, unsweetened drink made up with water. The texture doesn't bother me, with stirring right from the beginning of adding the water, there is no clumping. After 10 days there is no effect on my bowels which were regular previously anyway. My doctor wanted me to use this although I already have a high fiber diet.
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Reviewed in the United States on April 25, 2026
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AB
Los Angeles, US
★★★★★ 1
Definitely Not Unflavored. This is Tart / Sour, Which Limits the Options to Certain Juices
Flavor Name: Unflavored, Size: 1.46 Pound (Pack of 1)
I was expecting an unflavored fiber powder. However, expect a sour/tart taste. This means you can't add it to tea or coffee. I don't think it is appropriate to say that it is "unflavored" as I've had psyllium husk from other vendors that are truly "unflavored" (i.e. no citric acid). Dextrin (another fiber source) is also unflavored. But this Metamucil is tart (like sucking a lime) and can only be added to tart juices like orange juice or lemonade.
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Reviewed in the United States on May 19, 2026

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