Should a Muffler Have a Hole?

All mufflers have small holes through which water drains, but your vehicle's muffler should not have holes near the tailpipe(s). If it does, these are likely holes caused by rust eating through the muffler's metal surface.

Is it bad to have a hole in your muffler?

Driving with a hole in your muffler is potentially dangerous. Exhaust fumes leaks into the interior of your vehicle and exposes you and your loved ones to carbon monoxide. Furthermore, a hole in the exhaust pollutes the environment more than a properly working exhaust.

Does a hole in the muffler affect performance?

Does Leaking Exhaust Affect Performance? It is true that if your exhaust pipe has a hole or a leak, your engine performance will be affected. ... When an exhaust system is compromised, it will reduce the performance of the engine and also limit the fuel economy.