Can you cut off a catalytic converter on 2003 Chrysler voyager and put straight pipe on?

No, you should not cut off your catalytic converter and install a straight pipe on your 2003 Chrysler Voyager. This is illegal in most jurisdictions. Catalytic converters are crucial for reducing harmful emissions from your vehicle's exhaust. Removing it will result in your vehicle failing an emissions test (if required in your area) and could lead to significant fines. Furthermore, it will increase the harmful pollutants your vehicle releases into the environment.

Beyond the legal and environmental consequences, removing the catalytic converter can also damage your engine. The catalytic converter plays a role in engine backpressure, and removing it can lead to increased engine stress and potential damage in the long run. The sound of the exhaust will also be significantly louder and more obnoxious.

If you're having issues with your catalytic converter, it's best to have it repaired or replaced by a qualified mechanic. While it might seem like a cheaper solution to remove it, the long-term costs and risks far outweigh any perceived savings.