That could be it, it was -27 the day I had issues, but like I said it was only once I stopped riding and didn't have the airflow, pretty typical with most goggles though
Sensor goes into the pipe, and the mounting brackets for the APP one is manufactured quite well. Another option depending on where your from is a specialty sleds can, not sure if you can get them online but they do sell them at Grassland Trailer and Skidoo. I put one on the wifes 600 HO summit...
I had a MBRP on my 2011 backcountry x, hated it, lost power and bogged down a lot. Switched to an APP can and didn't have any issues. Put an APP can on my 13 summit x soon as I got it in my garage and so far I've put 300km on it, no issues and sounds great.
I have the sinisters and the aviators both work great especially with a 509 helmet. Only issue I've had with them is a bit of freeze up on cold days, only happens if I stop riding for longer than 5 minutes and don't stick them in my jacket to stay warm.
Not sure about that one, I can feel mine flex on a hard side hill. I'm definitely going to be looking into an aftermarket stiffener not a whole lot of choices out there yet though.