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Burger Motorsports B38/B46/B48/B58 JB4 Tuner
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Burger Motorsports BMW F Chassis G Chassis B38/B46/B48/B58 JB4 Tuner

$529.00

$529.00

Power gains of up to 100hp on a stock vehicle without the risks of flashing!

The JB4 is the most advanced and highly featured tuning system available for your B58 and B48 vehicle. Power gains are up to 80hp to the wheels (100hp crank) on a completely stock car on pump gas for a B58 and up to 40hp to the wheels (55hp crank) for a B48, gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher.

The JB4 features a simple plug and play installation harness for easy installation & removal and includes many features not found with any other tune. Including on the fly in dash map switching between factory and various performance maps, optional in-dash gauge displays for boost, boost limiting by gear for improved traction in lower gears, progressive water/methanol support, built-in data logging, built-in code reading, optional direct EWG control to prevent throttle closure with exhaust modifications, exhaust flapper control, and much more. Other more expensive tuners may claim to equal the JB4's technology but upon closer examination lack most if not all of the JB4's features.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but for those who are interested in logging, adding new features as we post them, etc, we suggest the BMS DATA cable or REV3 mobile phone adapter. The JB4 automatically detects between the B46, B48, and B58 models at boot up making installation and setup a snap.

JB4 Map Guide:

Map0: Stock tuning, fully disable JB4
Map1: 3psi over stock added (91 octane)
Map2: 4psi over stock added (91-93 octane)
Map3: 6psi over stock added (93+ octane)
Map4: Absolute target map with peak target of 20psi (93+ and/or 30% E85, EWG connector suggested)
Map5: Absolute target map with peak target of 22psi (30% E85+ fuel, EWG connector suggested)
Map6: Custom tuning map -- see details on n54tech JB4 page
Map7: Progressive WMI map with tuning a function of meth flow and user defined boost additive. 
Map8: VALET / Low Boost Map

Note for 2018+ G chassis vehicles with the digital dash layout we have not yet added in the JB4 commands to allow in-dash control but will provide those via a free firmware update once developed. Until then a JB4 mobile adapter or BMS data cable is required for any map and setting changes.

JB4_B58 is CARB Approved Under Executive Order (EO) No.D-744-4 for all 2016-2018 BMW 230i, 330i, 430i, 530i, 340i, 440i, 740i, M240i, and X1 applications.

Wirelessly connect the JB4 to your Bluetooth 4.0 compatible iOS and Android device via the JB4 Mobile connect kit, or to your Windows laptop with the BMS data cable. Both options allow 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. Separate JB4 Mobile app purchase also required.

JB4 Features and Benefits

• Power gains of up to 50hp 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 BMW 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 
• Free USA Shipping
• 5 year warranty

THIS PRODUCT IS DESIGNED FOR OFF-ROAD & RACING USE ONLY!
*Not Available in California*
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BMW 1 Series
• 2015+ B58 M140
• 2016+ B48 120i 

BMW 2 Series
• 2017+ F22 F23 B58 240i/iX
• 2017+ F22 F23 B48 230i/iX
• 2017+ F22 F23 B48 225i/iX 
• 2017+ F22 F23 B46 220i/iX

BMW 3 Series
• 2016+ F30 B58 340i/340iX
• 2016+ F30 B48 330i/330iX/330e
• 2016+ F30 B48 325i/325iX
• 2016+ F30 B46 320i/320iX
• 2016+ F30 B46 318i/318iX 

BMW 4 Series
• 2016+ F32 F33 F36 B58 440i/440iX
• 2016+ F32 F33 F36 B48 430i/430iX 
• 2016+ F32 F33 F36 B48 425i/425iX 
• 2016+ F32 F33 F36 B46 420i/420iX

BMW 5 Series
• 2017+ G30 B58 540i/540iX
• 2017+ G30 B46/B48 530i/530iX/530e

BMW X Series
• 2016+ X1 B46/B48
• 2018+ B46/B48 X2
• 2018+ B58 X3 M40i

For install guide, map guide, and the latest firmware click here.

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We are typically very quick and have a 24-48 hour turnaround time. Transit time depends on your order and which warehouse we are shipping from, but typical transit times are between 5-7 business days from one side of the US to the other.

Majority of the items we offer do ship free to the lower contiguous 48 states. States that require plane or boat to reach (such as Hawaii, Alaska, Puerto Rico, etc) do NOT qualify for free shipping. Please contact us to inquire about international shipping costs. During checkout, you will know which items ship free and which have shipping costs associated with them. In general, larger/heavier items will have additional shipping costs (body kits, wheels/rims, etc)

Even though everything can be shipped internationally, sometimes the cost is simply just too high and doesn't make sense to do so. We're here to make sure you have a great shopping experience, so if you have a product(s) you want to inquire about, please contact us at info@kiesmotorsports.com

Yes, we do price match reputable competitors in the marketplace. If you find a product cheaper elsewhere, please email us the (1) link of the product from our website and (2) the link to the competitor site. We will make an assessment on our end if we are able to price match or not and respond to you via email.

Typically you have 14 days to return a product you purchase when you change your mind. Damaged and improperly installed products are NOT eligible for returns. Shipping fees may be assessed and not refunded based on criteria as well as restocking fees. Please see our FAQ page for more details.

Unfortunate Kies Motorsports no longer does customer installs (with the exception of crank hubs - we still do thos inhouse). Our HQ is solely reserved for filming, office space, and shipping/receiving.

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