With Audi and MB going V8 biturbo, could BMW really counter with a V6? That's all they can come up with ? There's only ONE right answer of the 4 choices.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."