Quote:
Originally Posted by SANguru
good question. The concern is the crimping which would really restricts flow. On the a couple of dyno runs, the headers show about a 35hp gain.
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Yeah, I saw the crimping. The degree of crimping didn't seem to be the same on all pipes, which negates the benefit of having equal lengths.
wacky. Looks to me like they needed to crimp the pipe to get it to fit between the adjacent pipes. Not a very BMW solution to the geometry problem.