Genesis JB4


kia stinger jb4 tune

RIDICULOUSLY FAST SHIPPING! We ship the same day you order. Often within the hour!

440 horsepower and 520 pound feet of torque – at the wheels… Yes, that’s what happens when you install a JB4… A small price to pay for a whopping difference in performance! And it still feels like a stock Genesis when you’re just cruising along… 

For more information on how to connect and control your JB4 tuner wirelessly with the REV3 connect kit, click here

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• 2018+ Genesis G70 3.3T and 2.0T
• 2018+ Genesis G80 3.3T

This plug and play Genesis tuner attaches to two easy to access sensors in the engine bay and works with your factory ECU tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. It features a 64 mhz processor allowing sensors to be sampled 800 times per second using dedicated 10 bit digital to analog converters, ensuring smooth and powerful performance.

Unlike other tuning systems for the Genesis it also includes a fully programmable CANbus system, upgradable firmware, and data logging capability. CANbus allows the JB4 to take in to account pedal input, throttle position, gear, engine speed, air/fuel ratio, fuel trims, ignition advance, knock, and many other factors and incorporate those in to the performance mapping. It can also read/delete fault codes, incorporate unique safety features such as keeping boost pressure low until oil and water is up to temperature to provide proper engine and turbo lucubration, and drop to a low boost map if the engine starts to over heat, run lean, excessively knock, or over

The default JB4 map1 runs 4 psi over stock peak and tuned maps including stock and valet mode can be selected on the fly using a BMS diagnostics cable or JB4 mobile smart phone adapter.

Installation is very discrete and it quickly removes without a trace when needed. Fuel economy during normal driving is unchanged. Compatible with all driving modes. Made in USA. 5 year warranty.

As is well documented for the Genesis platform, both the 3.3L and 2.0L, is prone to spark blow out at both stock and higher than stock boost levels. At a minimum the factory spark plug gap should be closed to 0.022″. Alternatively replacement spark plugs can be used that offer a stronger spark and are more reliable than stock. If you have any questions regarding our spark plug suggestions and JB4 map guide, please click here and ask in our support forum.

2018 kia stinger performance tuner chip ecu flash jb4



JB4 Features and Benefits

• Power gains of up to 100hp and 100tq to the wheels on a stock vehicle
• Quick Plug & Play Installation
• CANbus integration offering unrivaled tuning features and performance
• Runs as smoothly as stock, this is how your Genesis 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
• 5 year warranty
• Works perfectly with the BMS Pedal Tuner for increased responsiveness

JB4 Terms and Conditions

JB4 Tuned 3.3T Dyno
kia stinger jb4 dyno

Additional information

Weight 16.60 oz
Dimensions 12 × 12 × 2 in
JB4 Options

JB4 Tuner, JB4 with optional bluetooth REV3 for diagnostics and updates, JB4 w/optional bluetooth REV3 and fuel wires, JB4 with optional BMS data cable for diagnostics and updates, JB4 w/optional BMS data cable and fuel wires