You will be taking a chance and could get a ticket. Not likely on the open bay but close to populated areas. Tobermory is definately a problem as the OPP station is right across from the gas docks. Pentang is where the poker run will be based again next wekend and they are some tolerant there but have been known to write the odd ticket. They will write you up in Honey Harbour as well. No idea of the cost tho.
I threw my downturns away and ran with 6 straight pipes this weekend with no tickets in the Midland / Penetang/ Honey Harbour area. I have mufflers on order tho as it seems to be the right thing to do.