JB4 for 2020+ Cadillac
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
Power gains of up to 60hp and 80tq to the wheels on a stock vehicle, and up to 100hp to the wheels on CT4-V Blackwing models.
From Luxury to Lethal. This plug-and-play tuner connects to easy-to-access sensors in the engine bay and works with your factory ECU to optimize boost, timing, and fueling for maximum performance and reduced turbo lag.
Installation is very discreet. Unlike flash remaps that cannot be fully removed, the JB4 leaves no trace and the vehicle is never aware it is producing higher boost or power levels. Fuel economy during normal driving is unchanged and it remains compatible with all driving modes.
Unlike less advanced tuning systems, the JB4 features full CANbus integration, allowing it to read critical engine data directly from the ECU for real-time tuning adjustments. This includes pedal position, throttle position, timing advance, fuel trims, air/fuel ratio, knock feedback, gear, and more. Systems without CANbus cannot monitor or incorporate this data, limiting both performance and safety. With CANbus, the JB4 delivers large power gains with smooth and precise power delivery.
JB4 includes multiple maps for 91 octane, 93 octane, stock mode, VALET mode, E85 mixtures, and unleaded race fuel. It also offers boost-by-gear control for improved launches, the ability to read and delete fault codes, and extensive customization. The JB4 is made in the USA and backed by a 5-year warranty.
Optional JB4 Harness Extensions: These plug-and-play connectors simplify installation and removal by bypassing the difficult-to-reach lower MAP sensor. Sold in pairs. Available here.
Optional Boost Control Module (BCM): Available for JB4-tuned 2022+ CT4-V Blackwing 3.6L Twin Turbo V6 engines. Available here.
Wirelessly Connect to your JB4: Add the all-new JB4 PRO smartphone connection to wirelessly connect the JB4 tuner to your Bluetooth-compatible iOS or Android device. Record and analyze vehicle data, change maps on the fly, and update firmware as we release free updates with new features and more powerful tuning maps. The adapter fits inside the JB4 enclosure for enhanced weather protection and a cleaner installation. The JB4PRO free app offers an intuitive interface, help features, and advanced log analysis tools to estimate performance and identify tuning issues. For more info on how to use the JB4PRO free app, click here.
JB4 Power Gains, Features & Benefits
- Power gains up to 60hp and 80tq to the wheels on a stock vehicle, and up to 100hp on CT4-V Blackwing
- Improves 0-60 times and 1/4 mile performance
- Preloaded with custom Cadillac JB4 tuning software and up to 8 maps for different fuels and modification levels
- E85 compatible tuning maps
- Ability to read and delete fault codes
- View and record up to 40 engine parameters in real time using the JB4 app
- Boost-by-gear control in 1st, 2nd, and 3rd for optimal traction
- Compatible with the free JB4PRO app for logging and tuning adjustments
- Quick plug-and-play installation
- Advanced CANbus OBDII integration for unmatched performance and safety
- Smooth factory-like drivability
- Compatible with all driving modes
- No change to fuel economy during normal driving
- 91 octane fuel or higher recommended for best performance
- Not VIN locked and fully removable and resellable
- Includes rugged billet aluminum JB4 enclosure
- Designed and assembled in the USA
- 5-year warranty
JB4 Vehicle Fitment
Available for Luxury, Premium Luxury, Sport, V-Series models, and CT4-V Blackwing.
Cadillac
• 2020+ Cadillac CT4 2.0L Turbo 4-cylinder
• 2020+ Cadillac XT5 2.0L Turbo 4-cylinder
• 2020+ Cadillac CT4-V 2.7L Dual Volute Turbocharged 4-cylinder
• 2020+ Cadillac CT4-V Blackwing 3.6L Twin Turbo V6
• 2020+ Cadillac CT5 2.0L Twin-scroll Turbocharged 4-cylinder
• 2020+ Cadillac CT5-V 3.0L Twin Turbo V6
• 2020+ Cadillac CT5 550T 3.0L Twin Turbo V6
What is a JB4?
The JB4 is a plug-and-play performance tune for turbocharged vehicles. It installs between your vehicle’s sensors and ECU to safely increase boost and optimize performance. With advanced CANbus integration, fuel and spark control, Bluetooth connectivity, and ongoing free firmware updates, the JB4 delivers more performance and functionality than traditional piggyback tuners. The JB4 is not VIN-locked, so it can be removed, transferred to another vehicle, or resold later.
Is the JB4 a real tune?
Yes. By tapping into engine sensors and CANbus data in real time, the JB4 can adjust boost, timing, AFR, and fuel trims similar to an ECU reflash, while retaining factory safety systems and avoiding ECU unlocking or flash flags.
JB4 Install Video
2021 CT4 2.0T dyno results
Burger Motorsports JB4 tuned 2024 Cadillac CT4-V Blackwing
Tapout Tuning picked up 80whp+ on 93 octane testing their 2022+ Cadillac CT4-V Blackwing JB4. More to come.
Cadillac CT5-V Dyno
2021 CT5-V, JB4, ~93 octane
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.