05-27-2021, 10:50 PM | #1 |
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M550 JB4
Hello,
I had the JB4 on my 2019 M550 for about six months. I was impressed with the power improvement and the simple install. I ended up going with a flash tune from RK and no longer have the need for the JB4 so it's up for sale $650.00 which includes the Jb4 and the Wireless Kit. |
08-10-2021, 04:13 AM | #7 |
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08-13-2021, 01:35 PM | #8 | |
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They said that the JB4 from 2019 model is the same for 2021 m550i |
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12-17-2022, 10:11 PM | #9 | |
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If you still have it I’ll take it. I’m new to the forums so just msg me and I’ll figure out the rest. |
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01-16-2023, 06:29 PM | #10 | ||||
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Correct, includes both JB4 and the wireless kit. I originally had it up for $650 but lowered it to $550. If you are still interested let me know. It's still sitting in the box in my garage |
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01-19-2023, 12:41 AM | #12 |
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I didn't get a chance to do a before and after dyno, so I'm not sure exactly what the numbers are. But you can definitely tell a night and day difference after the jb4 is added.
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01-19-2023, 08:43 PM | #13 | |
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Thanks, Jerry |
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01-20-2023, 05:56 AM | #14 | ||||
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02-14-2023, 06:34 PM | #15 |
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I can’t pm right now how much for it
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