go down to the ploice station, tell the desk sargent what happened n say you want to make a complaint.

the coppers are talking complete bollocks n trying to "do you" for something thats perfectly legal...

its harrasment plain n simple... kick up a fuss... a BIG fuss

if they give you any shit TELL THEM (politely) to find where in the road traffic act that it states exhausts must sound a certain way and if they cannot do this, and are unwilling to drop the charge with a FULL apology then you'll be going straight to the local papers...

PLEASE do this as if you dont the wanker coppers will keep getting away with it