SKU: 4174300091

JB4 Fuel Pressure Upgrade Kit for 2020+ BMW B58/S58/B48

$164.70 $183.00
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Ships within 48 hours · Estimated delivery Jul 28 - Aug 2

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Description

JB4 Fuel Pressure Upgrade Kit for 2020+ BMW B58/S58/B48Finally an upgrade kit that adds a high fuel pressure connection to the JB4 for B58 B48 Gen2 and S58 platforms allowing direct control of fuel pressure and fuel trims. Most useful for manual transmission vehicles or those running heavy E85 mixtures on a locked ECU. It's easy to install and includes a replacement JB4 board and a fuel pressure connector harness that attaches to your existing JB4 harness. Note this kit is not compatible with Gen1 B58

Finally an upgrade kit that adds a high fuel pressure connection to the JB4 for B58/B48 Gen2 and S58 platforms allowing direct control of fuel pressure and fuel trims. Most useful for manual transmission vehicles or those running heavy E85 mixtures on a locked ECU.

It's easy to install and includes a replacement JB4 board and a fuel pressure connector harness that attaches to your existing JB4 harness.

Note this kit is not compatible with Gen1 B58 motors.

Customers who purchased their JB4 new from BMS or an authorized reseller and their upgrade kit directly from BMS can receive a $75 core refund for their original JB4 board. To take advantage of this core refund ship your original board along with copies of the original JB4 purchase receipt and your JB4 upgrade kit order number to the address on our website. Cores must be received 45 days after upgrade kit receipt to qualify. 

For installation directions and additional information click here.


Vehicle Fitment

BMW 2 Series
• 2022+ B58 G42 BMW M240i, M240i xDrive, and M240xi
• 2023+ S58 G87 BMW M2
• 2022+ G42 B48 BMW 220i, 230i
• 2020-2021 F22 F23 B48 BMW 230i including xDrive
• 2020-2021 F22 F23 B48 BMW 225i including xDrive

BMW 3 Series
• 2019+ B58 G20 G21 BMW M340i, M340i xDrive, and M340xi
• 2021+ S58 G80 BMW M3
• 2021+ S58 G80 BMW M3 Competition
• 2020+ G20 G21 B46 B48 BMW 318i, 320i, 320Li, 320e, 330i, 330e, 320Li including xDrive

BMW 4 Series
• 2021+ B58 G22 G23 G26 BMW M440i, M440i xDrive, and M440xi including Gran Coupe
• 2021+ S58 G82 BMW M4
• 2021+ S58 G82 BMW M4 Competition
• 2022+ S58 G83 BMW M4 Convertible  
• 2021+ G22 G23 G26 B48 BMW 420i, 430i including Gran Coupe and xDrive
• 2020 F32 F33 F36 B48 BMW 430i including Gran Coupe and xDrive
• 2020 F32 F33 F36 B48 BMW 425i including xDrive

Toyota Supra
• 2020-2026 Toyota GR Supra Mk5 B58 3.0L 6 cyl.
• 2020-2026 Toyota GR Supra Mk5 B48 2.0L 4 cyl.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 4174300091

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4.1 ★★★★★
Based on 6 reviews
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Bambi Forester
Lexington, US
★★★★★ 5
Excellent ingredients and product!!
Scent: Unscented, Size: 4 Fl Oz (Pack of 1)
I rarely do reviews, but I am extremely impressed with this product and company. First it comes in beautiful packaging, the ingredients are pure, great, and so healthy! The price is good, and there isn’t any rancid smell which has been an issues with other similar products I’ve bought. I specifically bought the unscented to make sure it didn’t smell rancid, and it doesn’t. If I had one criticism it’s that there isn’t a phone number for contact just the website. I’m elderly, so I prefer to talk with someone. But, after I just experienced 2 bad experiences with similar products that I had to return, I so happy that I ordered this one. And, I’m so impressed that I’m going to order more now! 😁 Thanks 🙏 Terra Lotus for providing us with a great 👍 product!! Bambi Forester
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
E
Verified Purchase
Elizabeth
New York, US
★★★★★ 5
Worked well with us!
Scent: Citrus, Size: 2 Fl Oz (Pack of 1)
I’ve been trying different products for my daughter’s eczema-prone skin. Her skin was getting really dry, irritated, and rough in certain spots, and this balm has been super moisturizing and soothing. I love that it’s made with simple, natural ingredients and doesn’t feel harsh on her sensitive skin. A little goes a long way, and we’ve noticed her skin staying softer and less irritated after using it consistently. Definitely one of the better products we’ve tried lately 💛
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
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Verified Purchase
Luke Flanagan
Bozeman, US
★★★★★ 5
Bang for your buck
Scent: Unscented, Size: 2 Fl Oz (Pack of 1)
Incredible bang for your buck! Has kept my wife and I’s skin hydrated and has brought a lot of nice color and even smoothed out some dark spots. It’s fragrance free which is awesome for sensitive skin. And it’s easy to use! Make sure you keep it in a cool place cause it can melt! Fantastic product will continue to buy this
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Reviewed in the United States on May 18, 2026
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Jessica
Massapequa, US
★★★★★ 5
Natural remedy for treating keratosis pilaris (KP).
Scent: Unscented, Size: 2 Fl Oz (Pack of 1)
The most pleasant surprise about this tallow balm is that it’s a very effective natural remedy for treating keratosis pilaris (KP). It’s intense moisturizing properties help smooth the "chicken skin" bumps and reduce redness. It’s a natural alternative to conventional lotions by nourishing the skin barrier without harsh chemicals. I couldn’t believe my eyes when I saw the skin texture on the back of my upper arms after rubbing it in. My skin looks and feels much improved when I use it and hopefully will continue to improve over time with continuall use! If you have not found an all natural product to help smooth and reduce KP bumps give this tallow balm a try!
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Reviewed in the United States on May 15, 2026
M
Verified Purchase
Mandel Golden
Omaha, US
★★★★★ 5
Smells Great, Feels Great, Lasts Long
Size: 4 Fl Oz (Pack of 1), Unit Count: 4.0
This stuff smells great and it keeps dandruff away. It lasts a very long time and leaves your hair feeling healthy. A little bit goes a long way so it’s definitely worth the money.
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Reviewed in the United States on September 20, 2025

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