why some vehicles have duel exhaust system? what could be the reason?
some vehicles have them for appearance purposes, some have them for performance reasons. A lot of it depends on how the system is built and the engine in the car. if the engine is an inline engine, meaning the cylinders are in 1 row, it usually has 1 exhaust manifold. thats what connects the engine to the exhaust system. on those engines its basically for appearance purposes, if the engine is a V engine, like a v6 or a v8, theres 2 rows of cylinders, and 2 exhaust manifolds. on those cars, a lot of people prefer to have each exhaust manifold have its own exhaust piping and muffler. sometimes even on those engines though, the systems arent true duals like i just described, and in those cases, its for appearance purposes. people like to look like their cars are fast sometimes.
dual exhaust pipes reduce the back pressure on the engine allowing it to receive more of an intake charge for more horse power
