What happens if you put a steel wool ball in the exhaust pipe?

[LaFinn]

Putting a steel wool ball inside the exhaust pipe won't actually block the exhaust pipe, although blocking the exhaust would cause the vehicle to stall and fail to start. Here's some additional information: 1. It's not a simple matter for the steel wool ball to get stuck in the exhaust pipe. The friction between the exhaust gas and the pipe wall creates pressure inside the exhaust pipe that is higher than the external atmospheric pressure. This difference is known as the exhaust backpressure value. 2. Although it won't completely block the exhaust pipe, if the steel wool ball does get stuck inside and can't come out, it will have an impact. Exhaust backpressure is a relatively important indicator in the development and design of an engine's exhaust system. Engineers have arrived at the optimal result through continuous experimentation and significant investment.