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Funny you should say that as this I think is something that needs looking into. Donington have 109 decible signs up all over the place but the scrutineers insist on 105 as apparently thats what it says in the Blue Book or something????? Confused you will be! Wayne Moosehead altered his Mustang exhaust to the 109 limit and failed scrutineering and had to bolt the extra mufflers on to pass.
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