Exhaust noise limit!

[SportsCarShop]

Noise!!!!Hi, I hope someone can throw a light on the definitive legal noise limit on a road car, and how a police officer is allowed to test and issue a fine at the roadside, would be very helpful indeed!!

[SportsCarShop]

Don't disagree with that as long as things are done fairly. there is more control on bikes with exhaust labelling.

What I'm trying to ascertain is the point of law that a police officer is calling upon when using a sound meter to issue a ticket, , and how the test process is proven. If the vehicle was in front of a race sound test the rules would be clear