pipes

Selling my Ti Akra from my old tracer that is gone now. It is in used condition (5k miles or so) so it is not perfect, but in very very good condition. Slight scrape on one of the down pipes where it sits under the bike. Some light surface discoloration on the down pipes also. Located...

This either happened after 1st service or for gearbox recall, I imagine it was when tank lifted they pulled it up high instead of disconnecting the drain pipes and then didn't ensure back down properly seems like they are caught on something under tank. I have a pic when got bike showing them...

Hi guys, My exhausts finally arrived, however i'm just wondering weather or not I should use some sort of exhaust paste? The instructions don't mention any and the pipes link and really snug and tight so i'm really not sure if they need it. Presumably if they did it would come with it...