Yeah I've heard that before, I'm really skeptical that cat's really do that much anyways besides remove the smell of an engine idling. It's just disappointing how little sound there is with the cats on too lol
It just really pisses me off because the state makes you pay a private business $50 now to smog your vehicle, which is just a visual inspection for all emission parts and a sniffer, and then another $8.50 for them to send your passing certificate to the state. It's hard to get people to pass you without everything right too. so that's why I just took a few hours to put all the stock stuff back on.