Power gains of up to 40hp and 50tq to the wheels on a stock vehicle without the risks associated with flashing!

JB4 is a plug and play Honda tuner that attaches to two easy to access sensors in the engine bay and works with your factory DME 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 1000 times per second using dedicated 10 bit digital to analog converters, ensuring smooth and powerful performance. Power gains on the 1.5L Honda Civic Turbo motor are up to 50 horsepower and 60 torque (40hp and 50tq at the wheels).

Our JB4 Honda tuner installs discreetly and it quickly removes without a trace when needed. Fuel economy is unchanged during normal driving. Compatible with all driving modes. Does NOT require flashing the ECU! Compatible with both manual and CVT transmissions.

The The JB4 Honda tuner system is fully CANbus equipped allowing the tuning to take in advanced engine data for mapping, logging, and diagnostics. Data channels include boost, timing, air/fuel, fuel trims, throttle, knock control, and much more! Made in USA. 5 Year Warranty.

JB4 Honda Tuner Map Guide

Map 0: Disables JB4 all together
Map 1: +3.5 psi, default map. Suggested for 91+ octane.
Map 2: +4.0 psi, 91-93 octane
Map 3: +4.5 psi, 93+ octane
Map 4: +5.0 psi, 30% E85
Map 5: +6.0 psi, 30% E85 or race gas
Map 6: User Adjustable Custom Tuning Map
Map 7: +9.0 psi, 30% E85 or race gas, full send mode!
Map 8: VALET/Low Boost Map

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 & BENEFITS

• Power gains of up to 40hp to the wheels on a stock vehicle
• Improves 0-60 times and 1/4 mile times
• Preloaded with custom JB4 Honda 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 JB4PRO app.
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4PRO app for a perfect launch
• Compatible with the FREE JB4PRO app for 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
• Designed and assembled in the USA
• 5 year warranty

Vehicle Fitment

Honda
• 2016-Present 1.5L/2.0L turbo Honda Civic, Civic Si
• 2017-Present 2.0L turbo Honda Civic Type-R
• 2018-Present 1.5L/2.0L turbo Honda Accord
• 2017-Present 1.5L turbo Honda CR-V
• 2016-Present 1.5L turbo Honda HR-V

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 and is sold in over 67 countries worldwide.

Is the JB4 a real tune?

Yes the JB4 is a real tune. By tapping into specific sensors and CANbus for real time vehicle data the JB4 is able to alter your boost, timing, AFR, and/or fuel trims, to a similar degree an ECU reflash would, but without the vehicle ever knowing its been tuned. The result is safe, smooth, and significant power and torque gains while retaining your factory safety systems and without having to unlock/flag your ECU.

JB4 Tuner for Honda 1.5 / 2.0L Turbo Install Video

DYNO RESULTS

HONDA Civic 1.5 TURBO JB4 Tuned on dyno

JB4 tuned 2018 Honda Civic Sport CVT Dyno

2018 Honda Civic Si Dyno

2017 Civic typeR, pump gas, stock vs. JB4 Map1 Dyno honda civic type r dyno stock vs. tuned

DRAGY RESULTS

VIDEOS

Honda Tuners, Intakes, and Mods

JB4 Tuner for Honda 1.5 / 2.0L Turbo