Okay so i have no clue how everyone can get their fmf pipes to not leak between the flange and the head pipe because I tried the copper rtv and it just disintegrated after the first couple rides. I tried copper flashing and wrapped the flange and forced the pipe over it, that wore out too. I’m getting pretty annoyed because I know leaks are bad for it and I have no clue what else to do to get it to seal and stay sealed. Any ideas?