This XFORCE Varex Muffler features a hidden motor design and a 3" inlet oval shape with a 4" x 9" x 15" body size. Its centre outlet and offset inlet make it a universal R Series product that offers higher flow rate when the valve is closed compared to the original Varex. It is not recommended for Turbo vehicles, but is highly recommended for Hot-Rod and muscle car applications. When the valve is closed, it effectively reduces sound without compromising on performance.