Is it possible to make your exhaust louder by cutting it?

Yes...i have an 07 cobalt special edition supercharged and my friend stabbed holes into my muffler without me knowning...but i am somewhat happy because it does make the car sounds much louder and it sounds like i have an expensive exhaust system on it...but i recommend getting an exhaust system Yes...i have an 07 cobalt special edition supercharged and my friend stabbed holes into my muffler without me knowning...but i am somewhat happy because it does make the car sounds much louder and it sounds like i have an expensive exhaust system on it...but i recommend getting an exhaust system