In some cases, it may be possible to replace the catalytic converter with a pipe, but this should only be done as a temporary measure. Driving a vehicle with a pipe instead of a catalytic converter for an extended period of time can damage the engine and other components of the exhaust system. Additionally, it can lead to increased emissions that contribute to air pollution and environmental damage.
If you are considering replacing your catalytic converter with a pipe, it is important to weigh the risks and benefits carefully. Please consider the environmental impact and legal consequences before taking this step, as it is a serious environmental offense in most places.