Tail pipes are a crucial part of a vehicle's exhaust system, channeling harmful fumes and gases away from the engine and passengers. When choosing tail pipes, consider material, diameter, and sound output to ensure compatibility with your vehicle and desired performance. Material options include stainless steel for durability and resistance to rust, and chrome for a polished look. Diameter can affect exhaust flow and performance, while sound output depends on your preference for a quieter or louder exhaust note.