Mine just keeps coming off (well it happened once and i had it for a month) those rubber things that are meant to hold it...get it to the workshop and weld on some extensions?

You need to make sure the hanger bars protrude from the rubber hangers, when you install the exhaust.

If the bars arent long enough, get them extended. If they are long enough, put some small hose clamps on the end of the hanger bars, to keep them from sliding off.

or weld on some washers. and when u need to remove u just pull the rubber hanger off instead of only the muffler.