If its standard exhaust pipes, there's several ice cream potong inside, all not connected. By stuffing insufflex, it will drop down to the muffler box. The more you stuff, the better exhaust noise deadening.

Inorder to make someone's exhaust ruptured, its better to stuff POTATO. Organic form of starch can stick the pipes. Exhaust air will not be able to get through and the exhaust muffler will be sufocating. Until the box can't stand, then the whole muffler will explode

If you only want a short term effect, just buy 1 potato & stuff the exhaust tip. Exhaust can't get out, car can't start but that's all and will not permanant harm the exhaust pipe. To start back the car, use chopstick to poke a hole at the potato, after start fev few tims the frenfries will fly out liao