* Carbon monoxide poisoning: Exhaust fumes, which contain deadly carbon monoxide, will pour directly into the passenger compartment. This can lead to unconsciousness and death.
* Loud noise: The lack of a muffler will make the car incredibly loud, likely violating noise ordinances and potentially damaging your hearing.
* Damage to the engine: The exhaust system helps regulate back pressure in the engine. Without it, the engine may run poorly or be damaged.
* Legal issues: Driving a vehicle in this condition is illegal in most jurisdictions.
If your exhaust system has fallen off, have it towed to a repair shop. Do not attempt to drive it.