front uprights
 

Hi i recently purchased some front up rights and the bolt that clamps the mushroom insert in is missing any one know what size it is ?

Cheers,
DaveyB

M12x40 originally, but you want ~25 mm extra for the wing stay mount.

Update: grade 8.8 is OK, as it's what it was on Sierra.

Mushroom insert
 

Hi and thanks for the help, could you also tell me if the mushroom insert is actually clamped in that position being the only way it is held in place, sorry if this is a stupid question.
DaveyB

You also need a secondary fixing to please mr iva. normally a hole drilled and tapped with a bolt or grub screw fitted through upright into mushroom.......once you have it positioned correctly! i.e offset towards the front!

Mushroom insert
 

Thanks for the help are there any specific photos of this any where you could point me. Thanks again
DaveyB