N55 Cobb vs JB4
Hi all,
I am thinking of getting either a Cobb AP or a JB4 for my 2011 135i. I currently have a PPK but want a little but more so I am exploring my options. I don't have any other mods on the car and don't plan on any for now. What are some pros and cons and what would you think is the best choice? Please let share your thoughts with me, I really appreciate it.
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