Help, its me again guys & gals.
I'm still trying to get my trike sorted, two of the exhaust downpipes are rusted so need to be replaced. I tried to get all 4 off because I want to replace them all and 3 out of the 8 flange nuts broke off Probably not been moved since 1983.
Can anyone suggest a way for me to get them out so I can replace the down pipes ?

Thanks again!