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 Aug 14 - Aug 19

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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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Christina Visser
Phoenix, US
★★★★★ 5
My go to!
Style: Tropical Coconut
I freaking love this sunscreen, not only is the smell divine, but a little goes a long way. It doesn’t leave a greasy feeling or residue.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 15, 2025
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C. Herman
West Palm Beach, US
★★★★★ 5
Great stuff.
Style: Tropical Coconut
No weird smell or greasy residue, feels great on the skin. Tried it while on vacation (friend's lotion), and bought some when I got home. It is my go to now.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2025
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Verified Purchase
M
Natrona Heights, US
★★★★★ 5
My fave!!
Size: 6 Fl Oz (Pack of 1)
Wow. I'm so impressed with this conditioner that I'd pay three times what it cost, but I'm glad it's so reasonably priced! For reference, I bought this for myself, not a child, and my hair is medium-fine, wavy, and just past my shoulders. My hair is in good condition since I gave up heat styling a few months ago, starting using more organic hair products, and also switched from chemical hair color to using pure henna. But even though my scalp is oily, my hair is on the dry side because it's still recovering from the abuse I used to put it through, plus I live in the desert. So I like a rich conditioner that deeply moisturizes my hair, and this one does that better than any other conditioner I've ever tried, and I've tried SO SO many. My hair feels hydrated and silky after using this, and shines like crazy in the sunlight. The same day I used it, my husband commented "Your hair looks so healthy." This conditioner also brings out my waves and reduces frizz, without feeling or looking heavy... but a little goes a LONG way... this is a serious conditioner, not a watered-down drugstore product. So if you over-do it, your hair may go limp. I can't stand perfume-y smelling hair products, so I'm happy to say the aroma is natural, and while I wouldn't call it "light," it's certainly not strong. I really love the scent and would describe it as warm and comforting. I hope they never stop making this stuff. It reminds me of another conditioner I really like, by Accure, but I have to say I like the results and aroma of this one even better.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 4, 2017
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Verified Purchase
Gizel Roache
Pawtucket, US
★★★★★ 5
Very useful for babies
Size: 6 Fl Oz (Pack of 1)
This is a must buy. I bought this for my son who has hypersensitivity. A little bit goes a long way and it is very concentrated. The scent is not nauseating. It washes off well and is definitely worth the price.
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Reviewed in the United States on May 29, 2026
B
Verified Purchase
Brittney
Belleville, US
★★★★★ 5
Extremely nourishing and moisturizing
Size: 6 Fl Oz (Pack of 1)
Really like this conditioner for my daughter. It leaves her hair so soft after using, I use to use shea moisture kids conditioner on her hair and it would never feel silky or smooth after a shower. This conditioner definitely makes it feel nourished. I also love that it’s vegan. really good for your kids hair. I recommend it! As previous reviews states it has a bad scent, I don’t think so at all. The scent is just more natural. It’s not sweet and fake like these other conditioners. Love the product!
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Reviewed in the United States on May 28, 2020

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