JB4 Tuner for 19+ F-250 Super Duty, Diesel

Gain up to 80+horsepower and 150+ torque to the wheels! Instant horsepower by simply adding the JB Diesel (JBD) with no other modifications. In addition to power and torque gains throttle response is dramatically improved. It's the perfect racing addition to your 2019+ Ford F-250 Diesel.

The JBD works with your ECU to increase injector pulse width and fuel pressure as a function of the factory mapping. The result is huge smooth power and torque gains! All factory safety systems including EGT monitoring and limits remain in place and the JBD does not bypass or interfere with any emissions systems. The JBD includes a user adjustment dial internally allowing fine tuning for your specific power and torque needs. Easy one-plug installation.

DISCLAIMER: This Racing Product Is For Competition Closed Course Use Only. Not available for sale or use in California.

Dyno Results

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 the 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.