i now have this zero sports downpipe as shown in the pic, and the center pipe goes after that. the bolts connecting them have springs on. now there's a leake over there, cuz i cannot find the right gasket. the dealer said i should use a doughnut, but the one that used to be on the car looked like a falt gasket. i really need help. if anyone has done the downpipe mod before plz help!!! and attach a pic of the gasket if possible.

any and evey information will be helpful

thanx