what gets me is i have the bypass open avoiding the cat.. and the damn stove pipe i cant get it above 480f or so, before i was able to achieve this easily......... ive had that stove pipe 800+ before. with the bypass open, i wonder if that damnbypass came off the handle lever somehow and maybe not opening, im gonna have to wait for it to burn out, as i get a facefull of exhaust everytime i try to open it.