I bought the surewinproducts headers on eBay a few weeks ago. I haven't installed them yet, but the quality looks pretty decent - quality welds and non-magnetic stainless tubes. For the price I felt it was a good gamble. I wonder if the high priced headers are really made any differently. I'll report back after the installation - I too have to re-locate the rear o2 sensors, keeping the secondary cats.
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