Looks more like one of the threads to hold the heat shield on.
Only mounts are the 2 rear, the plate mount between the back and middle box and then the one on the centre section.
Cheers Carlv, any ideas what it looks like? i am sure i'm missing one or something as it currently looks like this ( ignore the split! weld on order!!)
[/IMG]
It is just after the middle box. A rod comes off and then sits in a rubber hanger. If you look under the car on the drivers side looking at the middle box it is at the back.
The bolt in question is unused.
Are you saying its shifts around too much while its split? Or even after fixing.
Are the mounts fairly new, they corrode a lot, especially the middle one.
You could always go to Halfords & get one of these http://www.ebay.co.uk/itm/Universal...nt-Hanger-Strap-Band-Clamp-Pipe-/280964832301 & attach it to that unused bolt to hold your exhaust on as a temp measure.
This worked for me, but you may want to measure first. Cut the metal part down so only two holes are left, after the first hole, put a 90 bend in it & then attach to the unused bolt with a locknut. I can't remember the size, but if you are going to Halfords for that part pick up a pack of assorted lock nuts & there will be one that fits in the pack