Please advice: JB4 vs Dinan
I am new in modes world. I want to add some juice to my 2012 x6 3.5. What is pro and cons between JB4 and Dinan. According to spec power is practically the same but price for Dinan almost 5 times more. Can JB4 harm the engine and did you ever heard the story that dealer revoke warranty because of JB4?
Please advice other ways to add more fun to driving.
Thank a lot you all your Bimmer's fans.
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