Legality on muffler location

Discussion in 'Technical' started by ProckyZ89, Mar 4, 2017.

  1. ProckyZ89

    ProckyZ89 Senior Member

    I had a brief skim over ADR's but admittantly couldn't find what I was after.
    Perhaps too brief a look.

    However can anyone shed some light for me on if the muffler has to be at the very rear of the vehicle or can it be between the rear axel and back of the car

    Eg near the diff then pipes extend to the rear of the car the last 30-40cm ?
  2. stumagoo

    stumagoo Active Member

    My Pajero has no factory muffler after the rear diff, however I did put a resonator in there after the rear half was replaced with a larger pipe and a free flow muffler as it was droning a tad. infact here is a pic of how the stock set up looks >>

  3. Chrispy

    Chrispy Pretentious Upstart

    I've never heard of a location requirement for the mufflers specifically. There are rules on the angle and direction of the actual tailpipe however.
  4. Fists

    Fists Well-Known Member

    Yeah, nothing on the muffler but the exhaust still needs to extend past the rear hatch. If it's a bit loud and the cops see a straight pipe at the back they'll probably still send you to the shop though.
  5. stumagoo

    stumagoo Active Member

    on saying this I know a chap who was defected for only having 1 muffler, according to the cop who defected him "ALL" cars have 2 mufflers and any aftermarket exhaust has to conform with this rule...... needles to say the testing guy laughed at this then proceeded to tell him he needed an engineers certificate for the cammed up engine....
  6. Fists

    Fists Well-Known Member

    That's about the size of it, doesn't matter if the cop knows what is actually illegal if it looks funny he can send you through emissions which even a stock car wouldn't pass any more.
  7. Anti

    Anti 14.7 x 14.7 = 44.1

    The exhaust cannot exit before the rear axle. That's the NSW law

    TWIN TERROR Well-Known Member

    Oh dear I find this amusing. I have been working on a project the past 2 months (sorry have to be vague for a reason ;)). Now picture this. The vehicles that we have been producing (well like nothing usually seen - hopefully not seen by the public at this stage ) were at the stage to be used on the public roads. So as we all know you have to have them registered :rofl: or a unregistered vehicle permit :D. So picture this. Government roads guy comes to us (yep you read that correct he actually comes to us) looks and goes holly crap then takes a heap of photos, asks a few questions then says no worries I will sort it out :D. Next day our police contact arrives takes a look and laughs his head and says holly crap how the hell do you drive these things. We show him inside and he is amazed but still confused how these things will be driven at high speed very close to other vehicles on public roads with out doing damage :rofl: v(we are yet to tell him of the damage we plan on doing:rofl:). A couple of days latter I get handed a temporary permit :D :rofl: to drive these things on the road . Now I have one huge dilemma :D but have a feeling I will get off on a technicality if it comes to it. See I have to put the temporary permit on the front left lower side of windscreen :rofl::rofl:. This vehicle has no windows (yep that's a hole story for a later date). I now will always get a laugh out of how silly it is and how many hoops we have to jump through in our normal life's to deal with government departments who seem to think that citizens would somehow not be able to live without them.
  9. scottyoz1962

    scottyoz1962 Active Member

    Yeah but trying to get a world war 2 German Panzer VIII Maus registered and on the road in aus is going too always be a bitch of a fight :p
  10. AndyMac

    AndyMac Better than you

    There is none. Muffler can be anywhere. Only exit position, angle and dB are regulated.
  11. How are some of the older v8's with side exit pipes in front of the rear tyre getting away with it?
  12. AndyMac

    AndyMac Better than you

    It doesn't say it needs to be behind the rear axle. It just needs to be 40cm behind any possible ingress the case of side pipes, the door or rear opening window.

    From ADR 42/04 - General Safety

  13. gmbrezzo

    gmbrezzo Moderator

    AndyMac is on the ball with this one.
    Exhaust must not angle towards the pedestrians footpath.
  14. Anti

    Anti 14.7 x 14.7 = 44.1

    Holy ****

    Side pipes
  15. Fists

    Fists Well-Known Member

    What age are you talking about? Not many ADR directives are retro-active.
  16. My mum has a hz statesman with side pipes exiting in front of the rear wheels, pulled over plenty of times and never a defect. Pretty sure they are not stock either, given the rumble from it
  17. Fists

    Fists Well-Known Member

    Yeah, the national ADR only applies '89 onwards so it would have been set up to get through what-ever silly combinations of rules the states had at the time.

    That and the HZ is a piece of classic Australiana, not a Japanese snot rocket, so even if they could defect it there's far less motivation.

    You can still have side pipes as AndyMac said but it's quite hard to find a chassis that meets the criteria for having a sealed floor pan etc. Mainly supercars and cab-chassis utes.

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