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If money is not the first criteria, go with something other than dynomax. I have a set with ceramic coating and have been chasing a leak on the passenger side for some time. Now I have good copper gaskets but still can't seal it. I'm going to use some high temp silicone to seal it. Dynomax just does not use a very thick flange, and the o-rings around each pipe at the flange are not even. I have sanded down as best I can but still not flat. Next time I'm going with quality headers myself. You get what you pay for! Almost forgot, the ceramic coating has lost much of its luster and I found rust near the collector on the driver side.