Re: buzzing noise
Hi there, Had this myself - I am guessing that the resonator internals have come adrift. I ended up substituting a length of tubing which made the car very slightly noisier inside but no infernal buzzing which would have driven me nuts. I haven't bothered to cut the old one open but maybe this would cure the noise without extra sound inside the car - it is very robust so even without internals it would still do a fair job perhaps.
All the best, Steve.
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