Do V6 engines have to two exhaust pipes?

No, V6 engines do not necessarily have to have two exhaust pipes. Some V6 engines may have a single exhaust pipe, while others may have two or even four exhaust pipes. The number of exhaust pipes on a V6 engine depends on a variety of factors, including the engine's design, performance, and emissions requirements.

For example, a V6 engine with a single exhaust pipe may be used in a smaller, less powerful car, while a V6 engine with two or four exhaust pipes may be used in a larger, more powerful car. Additionally, some V6 engines may have a single exhaust pipe with a dual-outlet muffler, which gives the car the appearance of having two exhaust pipes.

Ultimately, the number of exhaust pipes on a V6 engine is a design decision made by the car manufacturer, and there is no one-size-fits-all answer.