Yes, they are bog standard rivets.
If the packing is made up of small individual fibres it will blow out more easily than the string type packing originally supplied with this silencer. This is because there is no protection between the centre pipe and the packing. There is no problem with this, it just means re-packing more frequently. On the other hand, Raceco silencers use a mesh sleeve and "blanket" type material wrapped around the pipe before the packing, which is a more efficient system, at least in terms of packing life.
I don't know if James Whiting still supplies these silencers, but he may know where to get the original packing material, which is like fibre glass string, about 3 or 4mm dia., and yes just shove it in, in doughnuts- tamp down with a length of wood, not too tight, not too loose, and a bit tighter around the entry end as this takes more heat and pressure.
Wrap a length of masking tape around the end plate edge before re-fitting so as to take up any gaps, re-fix in the original position (obviously) and insert all the rivets before using the rivet gun, otherwise you might have a problem lining up the last holes.
Edited by - OAP on 10 Jul 2006 17:59:00
Edited by - OAP on 10 Jul 2006 18:07:49