As a product or industry expert, the XFORCE - 3" Inch Round Metallic Hi-Flow Racing Catalytic Converter (100 Cell) is an essential component for any racing vehicle. It features a 6-inch length and a round shape with an inlet size of 3 inches and a diameter of 4.5 inches, making it perfect for high-performance cars. Its construction using metallic materials guarantees a superior and efficient flow, enhancing the overall performance of your vehicle.