Would a large hole in the side of your catalytic converter cause car to sound really loud?

Yes, a large hole in the side of your catalytic converter can cause your car to sound really loud. The catalytic converter is a component of your car's exhaust system that helps to reduce emissions. It does this by converting harmful pollutants into less harmful substances. If there is a hole in the catalytic converter, these pollutants will be released into the atmosphere and can cause your car to sound louder than usual. Additionally, the hole can cause the exhaust gases to flow more freely, which can also contribute to the increased noise.