A dual exit on the other hand, is just a single exhaust system but with two exhaust tips. This is because, with a cat-back exhaust system, you will experience a significant increase in your fuel economy. The tone provided by different cat-back exhaust systems varies from one system to another.
When used in the context of aftermarket parts or performance upgrades, "cat-back" is used to indicate which section of the exhaust system the parts replace. Cat-back systems are available as both single- and dual-exhaust. All Thermal R&
