- Description
- Fitment
- Refund Policy
Power gains up to 80WHP & 100WTQ on a stock Grenadier without the risks of flashing!
The JB4 tuner for the B58 powered INEOS Grenadier is the most advanced plug & play tuning system available for the 3.0L turbocharged engine platform. Power gains of up to 80 horsepower and 100 lb-ft of torque at the wheels are possible on a completely stock Grenadier running pump gas. Vehicles equipped with bolt-on upgrades, higher octane fuel, E85 mixtures, or larger turbochargers can see even greater gains. Now includes the JB4PRO adapter and free app built in!
No ECU flash required and fully compatible with locked š ECUs.
The JB4 features a simple plug & play installation harness for fast installation and removal while offering advanced tuning features not available with other tuning systems. These include in-dash map switching between stock and performance maps, optional in-dash boost gauge display, boost limiting by gear for improved traction, progressive water/methanol integration, built-in data logging, fault code reading and clearing, optional electronic wastegate control to prevent throttle closure with exhaust modifications, exhaust flapper control, and many additional features.
Unlike many expensive tuning solutions, the JB4 does not require additional stages or supporting modifications. Simply install the JB4 as your first upgrade and immediately experience improved power delivery, smoother acceleration, and stronger turbo performance.
The JB4 requires no manual setup for basic operation. However users who want to adjust maps, log engine data, or access advanced tuning features can add one of our optional Bluetooth smartphone adapters.
Wirelessly Connect to your JB4:Ā Our all-newĀ JB4 PRO smartphone connection is included to wirelessly connect the JB4 tuner to your Bluetooth 4.0 compatible iOS or Android device. This option allows 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. Our new adapter fits fully inside the JB4 enclosure for enhanced weather protection and a more streamlined look. The JB4PRO Free app features an intuitive easy-to-use interface, help buttons, and advanced log analysis tools that can estimate the performance of your car and help identify any tuning concerns.Ā
For more information about the JB4PRO mobile app click here.
JB4 Map Guide
- Map0: Stock tuning ā JB4 disabled
- Map1: +3psi over stock (91 octane)
- Map2: +4psi over stock (91ā93 octane)
- Map3: +6psi over stock (93+ octane)
- Map4: +8psi over stock (Race gas or 30% E85)
- Map5: +10psi over stock (Race gas or 30% E85)
- Map6: Custom tuning map
- Map7: Progressive water/methanol map
- Map8: Valet / Low boost mode
JB4 Power Gains, Features & Benefits
ā¢ Up to 80hp and 100 lb-ft torque gains on a stock INEOS Grenadier
ā¢Ā Includes multiple tuning maps for different fuel types.
ā¢Ā Quick plug and play installation.
ā¢Ā Supports E85 ethanol blends.
ā¢Ā Reads and deletes fault codes.
ā¢Ā Displays and logs up to 40 engine parameters.
ā¢Ā Boost by gear control for improved traction.
ā¢Ā Controls exhaust flap operation on supported vehicles.
ā¢Ā Compatible with the free JB4PRO app.
ā¢Ā Offers better performance and safety than basic chip tunes.
ā¢Ā Full CANbus integration.
ā¢Ā Runs as smoothly as stock.
ā¢Ā Compatible with all driving modes.
ā¢Ā No impact on fuel economy during normal driving.
ā¢Ā Requires 91 octane or better for performance gains.
ā¢Ā Not VIN locked and fully removable.
ā¢Ā Includes billet aluminum enclosure.
ā¢Ā Designed and assembled in the USA.
ā¢Ā 5-year warranty.
Vehicle Fitment
INEOS Grenadier
- 2023+ INEOS Grenadier 3.0L B58 SUV
- 2023+ INEOS Grenadier Quartermaster 3.0L B58 Pickup
What is a JB4?
The JB4 is a plug & play performance tuner for turbocharged vehicles. It installs between engine sensors and the factory ECU allowing it to safely manipulate boost pressure, ignition timing, and fueling for substantial horsepower gains while maintaining factory safety systems.
The JB4 stands apart from other tuning systems through advanced CANbus integration, smartphone connectivity, ethanol compatibility, and continuous firmware updates that expand functionality and performance over time.
The JB4 system is not VIN locked and can easily be transferred to another vehicle or resold later. The JB4 has been the gold standard in plug-and-play turbocharged tuning for more than a decade and is used by enthusiasts in over 67 countries worldwide.
Is the JB4 a real tune?
Yes. The JB4 actively adjusts boost pressure, ignition timing, air-fuel ratios, and fuel trims using real-time engine data through its CANbus connection. This allows the JB4 to deliver performance gains comparable to ECU flash tuning while retaining factory safety systems and without permanently modifying the ECU.
Install Video
Stock vs JB4 Dyno Results
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we canāt offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you havenāt received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If youāve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor FeesĀ (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are alsoĀ non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
