Okay, i found this...
A great read.. However it is a QLD thing, but i'd imagine very similair in other states..
http://www.roadsafety.qld.gov.au/qt/LTA ... an05v2.pdf
ninja edit of title by KD for clarity - hope you don't mind Sam!
Modifying guidelines for your car (QLD)
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Modifying guidelines for your car (QLD)

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this one from the EPA Vic is a very common and useful guide. When u get a yellow stick its for an EPA check!
http://epanote2.epa.vic.gov.au/EPA/Publ ... E/1031.pdf
Page 6 for you sam
http://epanote2.epa.vic.gov.au/EPA/Publ ... E/1031.pdf
Page 6 for you sam

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yeah cool. however good luck with the eng. certificate as I'm sure the emissions wont meet EPA.FtoSam wrote:Lol.. Im getting all mine engineered with this new engine...
So should be bit better with cops then...
but would be good to see what they to get it cleared.
Check into the eng. certificate properly and dont take anyone's word for it. The EPA rule will be used as the bible.
From the QLD Transport:
|------------------------+------------------------+------------------------|
|Engineering Instructions|Vehicle Accesories | |
|------------------------+------------------------+------------------------|
Date Of 17/04/2 Date Of 17/04/20 No VA.06.04.0 Replaces/A
Issue: 002 Effect: 02 : 2 mends:
It has come to the notice of the Vehicle Safety and Industry Reform Section that a common modification to vehicles equipped with a turbo-charger installation is the fitting of an intercooler and a blow off valve.
Forced induction methods such as turbo-charging or super-charging have the potential to substantially increase the power and performance of a motor vehicle.
Apart from the engine itself, turbo-charging or super-charging affects four main vehicle systems. These are exhaust emission controls, vehicle noise suppression systems, braking system performance and driveline components.
Option 3 of Section LA of the Code of Practice (Light Motor Vehicles) permits the fitting of turbo-charged and super-charged engines to light motor vehicles in accordance with Schedule B of Section LA. A part of this approval requires that a “Safety Upgradeâ€