Scorpion Exhaust

[cyclopathic]

I read somewhere that original catalytic converter designs with one converter took a while to warm up to operating temperature in order to do their job.

Manufacturers then put a smaller cat closer to the exhaust manifold to warm up quicker. This would reduce emissions sooner after a cold start. Also, the heat from the first converter would help get the second converter up to temperature sooner, and also further reduce emissions.

Someone here please correct me if I am wrong on this. Thanks.

Makes sense. What is interesting some cars like Mustang now have 3 converters. Probably due to V8 configuration.