Thread: 540i Mods and Questions
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      06-04-2025, 11:53 PM   #4
KevsG30
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Drives: 2021 540i
Join Date: Dec 2024
Location: CA

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Originally Posted by DarthBMR View Post
Can't speak for the other mods but I have a JB4 on my '21 540i........incredible! The way the car should be!! Best bang for the buck imo!
How long have you had the JB4? Any issues you've experienced?
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