Thank you for your response!
Colombo cops seem to be somewhat fine with it, haven't had an incident *yet* but it's the cops outstation that I'm worried. I got stopped at the freaking toll gate and I can't imagine if they stopped me in a distant city, having me come all the way there without my vehicle to get my license back. That's literally my worst fear.
Funny enough, if you can afford it, you could technically buy the original muffler and toss it in the trunk. Then claim you're on your way to the mechanic? (I personally wouldn't do this as I'm just starting my driving career but I mean it's an option eh?)