Further to the "spud", when I swapped the car to the present on I thought I'd got another boomer. I tried a temporary experiment (which did look promising) with sound/heat insulation tape off ebay - plenty on there. Basically, I removed the silencer, then wrapped it in this tape. I then covered it in aluminium foil (actually kitchen foil, which was really too thin), for protection; the latter held on by metal cable ties. With it back on the car, it seemed a fair bit quieter, but a week later, it got very noisy. I removed it again, abandoned the experiment, and fitted a replacement (from Euro or CarParts4Less I think). The replacement is quite acceptable. The experimental one had blown a hole btw.
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