this is absolutely true, when you startup your car it will become immediately obvious because the engine exhaust sounds will be tremendous. Basically all those exhaust strokes of the engine pour out directly to the atmosphere never making their way to the muffler which muffles their sounds.

Right, but it won’t impact the livelihood of the victim which is the reason the person I am responding to has justified violence in response to catalytic converter theft. For what it’s worth I think people should be able to defend their property with force- but at least let’s be clear as to why.

Diesels with DPF systems will not operate correctly without cats. You will have 50-250 miles on DPF system error that you MUST get it fixed or the vehicle will go into a limp-in mode.

That’s true, but the vast, vast Majority of people getting their cats stolen are Honda Element and Toyota Prius owners.

yes but it wont pass an emissions test. And the repair can easily be $1,500 plus

So we’ve got a government that isn’t enforcing any sort of rule against catalytic converter theft but is also forcing us to pass an emissions test after someone steals my catalytic converter.

catalytic converter theft is already illegal. You want a government agent assigned to watch your car 24/7?

No, I want to be able to protect my catalytic converter.