Non turbo petrol ? What is the exact issue?
Watch out as many less expensive ones will cause the secondary O2 sensor to trigger a check engine light and code. This is because these cheaper converters contain less than 1/3 of the honey combs and perhaps even then not all the expensive metal coating. You may have issues passing the mot
Not sure but I think Bosal makes it for Volvo. I would also trust Magnaflow. Don't buy Walker
Same for the downpipe flexible, don't buy cheap ones. Normally it's welded to the converter
https://www.youtube.com/watch?v=VoAcofFZMkg