On Alfa number 15
AO Platinum Member
Join Date: Dec 2005
Location: United Kingdom
I wouldn't go to Kwik fit as there are too many horror storys on here.
I have had a Cat breakup on a 156, and the symptoms do sound similar to yours. You get a rattle from the Cat area, then bits of the cat travel down the pipe and block the silencer downstream of it.
I also found bits of the cat coming out of the tailpipe.
My car wouldn't rev past 2000 rpm when it happened.
Try buypartsby for a new cat, you may get away with emptying the bits out of the silencer, it depends how far inside they have travelled.
You will never be cool driving a Vauxhall.