Anybody see this? Just wondering if anyone had used these before. I doubt they'd make much difference but any hp gain at all would be nice. Anyone?
M42 Headers
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That was one question I asked the seller. Whether or not they were just ported stock headers. Never got a reply. The ad does say something about the diameter being larger. Who knows. Just rather curious about them. I was actually hoping for a dyno readout but I'll bet that's asking for too much!;)Comment
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Seriously doubt there is any power to be made switching to replicas of the stock headers with slightly larger primarys (if that)Tenured Automotive Service Professional - Avid BMW Enthusiast
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