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I'm not exactly sure I understand what you're asking about. I have TPIS headers, but I don't have any gaskets around the collectors. My headers have a slip-fit connector at the collectors. There is an H-Pipe that comes with the headers that I had welded to the stock exhaust and cats. The collectors then slip into the H-Pipe without any gaskets or clamps of any kind. It seems to be working just fine for me. Maybe TPIS has changed their header design?
I'm not exactly sure I understand what you're asking about. I have TPIS headers, but I don't have any gaskets around the collectors. My headers have a slip-fit connector at the collectors.
Yep, mine are like this too. Sure they are TPIS and TTS?