JB4 Tuner for 2018+ Jeep Wrangler/Cherokee 2.0L Turbo

  • $ 529.00
Shipping calculated at checkout.

Power gains of up to 40hp to the wheels on a stock Jeep!

The JB4 is the most advanced and highly featured tuning system available for your 2018+ Jeep Wrangler/ Cherokee 2.0L 4 cylinder Turbo. Power gains are up to 40hp to the wheels (55hp crank) on a completely stock car on pump gas, gains with bolt-on parts, higher octane, and larger turbos are even higher.

The JB4 features a simple plug and play installation harness for easy installation & removal and includes many features not found with any other tune. Including on the fly in dash map switching between factory and various performance maps, boost limiting by gear for improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, and much more. 
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.
Latest JB4 firmware, map guide, support, and discussion here: https://www.n54tech.com/forums/showthread.php?t=60264

Alfa Romeo JB4 Tuner


• 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 Jeep tuning software and up to 8 maps for various fuel and modification levelsels
• Quick Plug & Play Installation
• CANbus integration offering unrivaled tuning features and performance
• Runs as smoothly as stock, this is how your Jeep 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
• Ethanol (E85) compatible tuning maps
• Able to read/delete fault codes
• Not VIN locked, can be removed without a trace and resold down the road
• Made in the USA
• Free USA Shipping
• 5 year warranty


• 2018+ Jeep Wrangler 2.0L
• 2018+ Jeep Cherokee 2.0L

JB4 install Guide


DYNO Results

2018 Jeep Wrangler Unlimited 2.0T

Jeep 2L stock vs. JB4 map2 93 octane

Jeep Jb4 Dyno VS. Stock

Jeep Dyno Jb4 tuner