Just found a neat little excerpt in the BC motor vehicle act, be careful where you decelerate...

Noticed this while looking for regulations related to bending a license plate. None exist for that as far as I can tell.

 

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Noise increase or flames prohibited Unless lighting Farts at night.
(5) No person shall drive a Freakin Honda or operate a Rx7 Based vehicle propelled by an internal combustion engine equipped with a muffler or exhaust system to which is attached any device which increases the noise of the expulsion of the gases from the engine or allows a flame to be emitted from the exhaust system.Unless you own a pink Drag Car,then it's OK.

Motor Vehicle Act Regulations
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There: I amended it..lol!

 

Now to let my car fade to a lighter shade of pink.

 

What that says to me is that you can not add any additional hardware to your exhaust to increase it's noise, or emit flames. meaning that you can't have a butterfly valve to increase or decrease noise or a spark plug at the end of tail pipe. That's interesting as many of the newer sports cars make use of butterfly valves in their exhaust systems.

 

Bent plate will be covered in whatever section of your statutes governs the display of the plate - in Alberta, it's considered tampering with the plate, same as if you painted different numbers on it, or just painted over it - and it's mucho dinero.

The other rule deals with devices that add and ignite gas in the exhaust - although I'm sure they could apply it to a modded rotary; with the required cats, there shouldn't be flames at the exhaust anyway. So one way or another, if you're shooting flames on the street, they can nail you for something.

 

This is very interesting.... oh well, better to know than getting pulled over not knowing what you did wrong.

 

I've received an "improper muffler" ticket in Ontario for flames.

 

Really easy to fight as long as the sound is within the acceptable decible range. All you gotta do is say the exhaust outlet is level with the bumper and the exhaust gasses properly exit behind the vehicle. As long as its not too loud, that ticket is BS.