Stop using RTV silicone to seal your flanges! Berk Technology is currently the only manufacturer of extreme temp graphite collector gaskets for the 03-06 350Z/G35. Instead of using a bandaid approach to gasket sealing like our competition, Berk Technology make their own custom gaskets for this application. High temperature softcrush graphite gaskets seal even slightly warped flanges.
You do NOT need to purchase these separately when using BERK HFC’s or test pipes. They are already included!
NOTE: Our gaskets align perfectly with the OEM flange & our BERK flanges. Our R&D Dept has found that some manufacturers do NOT machine their flanges correctly and will partially block the exhaust path.