JB1 to JB4 Upgrade Kit

Marsoni

M251S

$175.00

Get it in 3 business days with 1 day shipping. Friday, May 29

JB1 to JB4 Upgrade KitUpgrades your existing BMS Stage1 to a EA888 JB4 BETA system. The JB4 BETA features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water meth control, and much more. The upgrade kit cost is $125 outright. There is no longer a core exchange program available. After the upgrade you can keep your old

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Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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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

I fell in love with this cream. It leaves my skin soft, pleasantly scented, and deeply hydrated. I use it all over my body—especially on my arms, where I suffer from severe dryness—and it is helping me with my "chicken skin." The only downside is that I can't use it on my face, as the skin in that area is very oily and it causes me to break out. But overall, I definitely really liked this cream.

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Reviewed in the United States on May 28, 2026