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  1. Sold: For Sale: JB4 with Bluetooth Adaptor

    Selling my JB4 tuner, pulled off my 2023 M340I, B58-powered. I'm the original owner, ran it about half of my lease term, lease is up so time to sell. It was plug-and-play and had absolutley 0 issues. Includes: JB4 tuner unit Bluetooth adapter (wireless connect + JB4 app for live tuning, data...

  2. For Sale: JB4 with Bluetooth Connector Gen 2

    Selling my JB4 tuner, pulled off my 2023 M340I, B58-powered. I'm the original owner, ran it about half of my lease term, lease is up so time to sell. It was plug-and-play and had absolutley 0 issues. Includes: JB4 tuner unit Bluetooth adapter (wireless connect + JB4 app for live tuning, data...





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