Circular material saving, simple manufacturing, and low cost. Because circular pipes are commonly used components in various industries, choosing this shape as the exhaust pipe only requires direct external procurement, with a maximum of minor modifications and adjustments. Therefore, low-end cars generally use a circular pipe directly. Some of the better mid to high end cars will have a layer of chromium plated on the pipes, making them more aesthetically pleasing.
In addition, some cars may use exhaust pipes of other shapes, such as the Ruizhi’s generally quadrilateral shape and the BMW X5’s approximate 、rectangular shape. These exhaust pipes are generally integrated with the shape of the rear bumper, and are generally chrome plated. Due to their special shape, they are not widely used standard parts and need to be processed separately according to design requirements, resulting in higher costs.
