[Neil]

Originally Posted by park381

The link is in the post above, not my figures but the RAC's here's the link again
Noisy, dangerous and annoying | Auto Express News | News | Auto Express
It would be interesting to check yours at full blast (is that the term) but I have a pressing appointment at BGH next week.

I read it and it says

listening to sounds over 85dB for several hours a day can expect to develop hearing loss - and many car stereos dish out 110dB

it does not say standard fit anywhere in that. You other link does not mention levels. It does say this though

Caroline Flint

Regulation 97 of the Road Vehicles (Construction and Use) Regulations 1986 prohibits the use of a vehicle emitting avoidable excessive noise.

So why are there so many cars with big fat noisy exhausts?