You can only add the exhaust ring gasket if your tests pipes were designed for it. The mating feature to the headers is different to accommodate it. There is a portion of tube extending past the flange (header side) which would indicate that u can use the ring gasket.
I recently installed Berk gaskets with a bit of high temp red RTV on each side with good luck. My Z1 tests pipes don’t accommodate the ring gasket.
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2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes
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