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Jb4 tune on my 14 x1 with the n20 engine
Just looking for some input on the jb4 tunes. I’ve had mine for about 15k miles and haven’t had any issues. After some research, I have gotten some conflicting answers on whether the jb4 is a quality tune. I am aware that a flash tune would be the better option, but my x1 isn’t able to be flashed. If anyone has had experience using a jb4 or has done extensive research on them, could I get some information on the quality?
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