What characterizes a Dual Exhaust system?

A Dual Exhaust system is characterized by having two separate exhaust pipes that typically do not connect to each other, allowing for a more efficient expulsion of exhaust gases from the engine. This design can enhance performance by reducing back pressure and improving the flow of exhaust, which can result in better engine efficiency and power output.

In contrast, options suggesting connections or shared components imply a more integrated system, which does not align with the definition of a Dual Exhaust. For instance, having a single pipe or merging pipes before the muffler indicates a more traditional or standard exhaust system, rather than the separation characteristic of a true Dual Exhaust. Additionally, sharing a catalytic converter suggests that the two exhaust paths are not fully independent, which contradicts the essence of a dual setup where each pipe operates more freely and separately for improved performance.