JB4 Tuner for 2023+ Nissan Z 3.0L - Burger Tuning

The JB4 Performance Tuner for the 2023+ Nissan Z 3.0L Twin-Turbo is the ultimate plug-and-play tuning solution, offering power gains of up to 100 horsepower and 120 lb-ft of torque to the wheels on a stock vehicle. Designed by Burger Motorsports, the JB4 works seamlessly with the vehicle’s factory DME, remapping boost, timing, and fueling to maximize performance while maintaining OEM driveability and reliability.

Unlike flash tuning, the JB4 does not alter the factory ECU software directly. Instead, it intercepts and adjusts signals to safely increase boost pressure without affecting the manifold pressure reference. This allows the ECU to correctly adapt timing and fueling to the increased performance, resulting in stock-like drivability with significantly enhanced power delivery under throttle.

Installation is simple, connecting to just two easy-to-access sensors in the engine bay, and it integrates directly into the OBDII CANbus system to unlock advanced tuning features and data analysis. For those wanting full control, the JB4 offers Bluetooth mobile app support (via JB4 Mobile connect kit) or Windows PC connectivity (via BMS Data Cable) to log data, switch maps on the fly, update firmware, and adjust settings as needed.

The JB4 also supports boost by gear, ethanol-compatible maps, AFR adjustment, and exhaust valve control (where supported). This system is not VIN-locked, so it can be easily removed without a trace and resold or transferred to another compatible vehicle.

Whether you're driving daily or racing on the weekend, the JB4 is the most complete tuning system available for the Nissan Z platform.

Features

Performance & Tuning

• Gains of up to +100hp / +120tq at the wheels on a stock Nissan Z

• Reduces turbo lag and significantly improves throttle response

• 8 preloaded tuning maps for different fuels and modification levels

• 91 octane fuel or better required for optimal gains

• Ethanol (E85) compatible maps included

• Boost by gear control for enhanced traction in 1st–3rd gear

• Exhaust valve/flap control (where supported)

• On-the-fly map switching through JB4 Mobile app or laptop

Hardware & Integration

• Plug & play—connects to 2 sensors in the engine bay

• Integrated OBDII CANbus for advanced tuning, fault reading, and more

• 64MHz processor samples sensor data 1000 times per second

• 10-bit digital-to-analog converters ensure smooth signal adjustments

• Durable billet aluminum enclosure protects the system from heat and vibration

Monitoring & Control

• Compatible with JB4 Mobile app (iOS & Android – app sold separately)

• Optional Bluetooth 4.0 connection via JB4 Mobile Connect Kit

• Optional Windows PC connection via BMS Data Cable

• Live data logging and analysis of up to 40 engine parameters

• Read and clear fault codes directly from your device

• AFR (Air-Fuel Ratio) tuning support with optional fuel control wires

• Firmware updates regularly released for new features, maps, and performance

Additional Benefits

• Not VIN-locked—can be removed and resold or moved to another vehicle

• Runs smooth as stock under normal driving conditions

• Compatible with all driving modes

• Fuel economy unaffected during light throttle cruising

• Free firmware & map updates

• Made in the USA

• 5-Year warranty

• Free shipping (within the USA)

Fitment

• 2023+ Nissan Z 3.0L Twin-Turbo (including Nismo variant)

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.

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need proof of purchase.

To start a return, you can contact us at sales@palenonperformance.com. If your return is accepted, we’ll send you instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

You can always contact us for any return question at sales@palenonperformance.com.

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items
Certain types of items cannot be returned, Burger Motorsports does not allow returns, custom products (such as special orders or personalized items), JB4 Tuners and air filters can not be returned. We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on discounted items or gift cards.

Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. Certain circumstances will require a restocking fee of up to 25% at the discretion of Palenon Performance. (Examples of these circumstances include but are not limited to multiple failed delivery attempts, modified or damaged products and packaging, etc.) If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Handling

If the item is shipping from us direct, you will receive a tracking number within 1 business day. Most orders fulfilled at our warehouse will ship the same business day if ordered by 12pm MST. If the item is being drop shipped from the manufacturer, we cannot guarantee a tracking number within 1 business day. If an item is being drop shipped, we cannot guarantee the 24 hour (1 business day) processing time. A purchase of expedited shipping at checkout means that once item is ready to ship, it will ship using the upgraded shipping method. Some manufacturers require 3-5 days to process orders. Purchasing expedited shipping may speed up the processing time of your order, but we cannot make any guarantees in relation to faster processing time on the manufacturer’s end.

Cancellations

If you used a credit/debit card or PayPal to place an order and decide to cancel or return your order for any reason, a 5% merchant fee will be passed along to you (8% for Shop Pay installments). Some manufacturers can take up to 7 business days to ship out orders. If an item is out of stock we will reach out to you within 48 hours to confirm you would like to proceed with a preorder. If the item is listed as custom-built/ built to order within the description, or if the ETA or average lead time is visible on the product page at the time of ordering and you are cancelling inside of that ETA/lead time you will be charged the merchant fee. If the cancellation is outside of the time frame the merchant fee will not be charged to you for canceling.