an interesting read:
MODIFIED VEHICLE GUIDELINES 2006
TECHNICAL GUIDELINES FOR AIR AND NOISE EMISSION REQUIREMENTS FOR MODIFIED IN-SERVICE VEHICLES
Publication 1031
February 2006
http://epanote2.epa.vic.gov.au/EPA/Publ ... E/1031.pdf
Then from here:
http://epanote2.epa.vic.gov.au/EPA/Publ ... /317.1.pdf
you get noise and emission speed test requirements.
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