This is super simple to understand. IF the aftermarket component was found to be the cause of the failure in question, the MFG "may" void the warranty. If you have a Can and the chain case blows up, That's common sense that the can was not the root cause. If some idiot puts out a can (cough. cough...Bikeman) that causes the engine to run out of safe parameters and it goes BOOM, then I'm sure your warranty claim will be denied. And there are sensors that measure pressure and temps in multiple areas. This is all recorded in the ECU, so BRP will know if it was not running correctly. The days of "just putting stock can back on" are over. Its 2024, not 1994.
There is not a car\boat\motorcycle\sled MFG that is going to warranty a person putting on crappy parts.
There is not a car\boat\motorcycle\sled MFG that is going to warranty a person putting on crappy parts.