A couple of months ago, I was thinking about installing a stainless racing manifold header on my son's 1986 325es. I was open for advice from the forum. Most owners told me not to do it, since the original header is better.Any changes or improvements with the horsepower?
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2012 535i 6 Speed
2001 530i 5 Speed
1986 325es 5 Speed
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2012 535i 6 Speed
2001 530i 5 Speed
1986 325es 5 Speed
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