Noise limit for road cars

[Bibs_LEF]

I know that the MOT test doesn't check noise levels but is there a regulation under the Construction and Use regs?

I, erm, know of someone with a 113dB exhaust on their roadcar, my friends cousins brothers sister. Is there a chance of a ticket/ASBO?

[Bibs_LEF]

It's very handy that the exhaust is at the back of the car, and the seats are in the middle. Means you don't hear all 113dB directly in your lughole.

If you want to sit behind my car for a while, you're more than welcome.

[Bibs_LEF]

If you can't increase the noise level of your exhuast from the level when it was new how come companies like Larini, Tubi, Quicksilver et al sell aftermarket systems without a 'track use only' caveat? To be fair, even that would be little use as they are too loud for most tracks anyway!

Back to topic, what would the offence be and what are the likely penalties?

Ps it's not a corsa/saxo, it's on a very good looking high performance supercar!