Could try:
http://www.ebay.co.uk/itm/Stud-Extractor-Remover-Installer-8-19mm-1-2-Inch-Drive-Sealey-VS7232-NEW-/400889357545?pt=LH_DefaultDomain_3&hash=item5d56de24e9
or
http://www.ebay.co.uk/itm/3-8-1-2-S...303?pt=LH_DefaultDomain_3&hash=item27f9bcfacf
or
http://www.ebay.co.uk/itm/Irwin-Bolt-Grip-Remover-Extractor-5-Piece-Expansion-Set-10504635-/381237641748?pt=LH_DefaultDomain_3&hash=item58c388c214
I've got this type, works well.
Of course, this only works if there is enough thread to stick through the nut!!
http://www.ebay.co.uk/itm/Stud-Extractor-Remover-Installer-8-19mm-1-2-Inch-Drive-Sealey-VS7232-NEW-/400889357545?pt=LH_DefaultDomain_3&hash=item5d56de24e9
or
http://www.ebay.co.uk/itm/3-8-1-2-S...303?pt=LH_DefaultDomain_3&hash=item27f9bcfacf
or
http://www.ebay.co.uk/itm/Irwin-Bolt-Grip-Remover-Extractor-5-Piece-Expansion-Set-10504635-/381237641748?pt=LH_DefaultDomain_3&hash=item58c388c214
I've got this type, works well.
What Carl means is take the downpipe off, wind a standard nut on the remains of the stud and burr the top over to "seal" the nut on the stud. Then unscrew it.Sorry not with you lol
Of course, this only works if there is enough thread to stick through the nut!!