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Old 12-13-2012, 02:08 PM   #12
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Join Date: May 2008
Location: San Francisco, CA
Posts: 171
My Ride: 2000 323i
They're suppose to be stainless, but they're highly magnetic, which makes me suspicious. As for the warpage, I'm not exactly sure. I'll do some digging and report back later today.

Originally Posted by View Post
Are these mild steel or SS headers? The warpage some have mentioned, is this on the head flange or is this tube / collector related?
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