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.

JB4 PRO smartphone tuning app for Acura vehicles

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

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

Acura TLX Type S JB4 dyno results horsepower gains

Acura

Honda/Acura/Kia/Hyundai/Genesis Billet Oil Filler Cap by BMS

JB4 Tuner for Acura