Quote:
Originally Posted by Henry1515
Lesson learned here is never change anything that is stock.
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Why? Thinking that Stock = Best is naive. Every mod you do will give you something and take away something else. Since you absolutely don't know what that valve does, the "lesson" you mention is an unsupported claim..
Incredible how the X6 users here are chickening out on doing simple mods to this incredible CUV. The X6 has a lot of performance potential beyond what BMW provided. Why the fear?