Muffler 3.0"Inlet/Outlet Straight Universal Glass Pack Exhaust Resonator Muffler Inlet Diameter (Inner Diameter): 2.5 in Outlet Diameter (Inner Diameter): 2.5 in Overall Length: 19 in Body Length: 14in Material: 409 Stainless Steel Other Dimensions as shown in picture High performance universal muffler. Durable construction for long life. Stainless steel has a protective function, corrosion resistance and heat resistance. Straight through perforated cores for the highest flow possible. Designed to dampen exhaust noise，facilitates undisrupted exhaust flow.The muffler that was quieter with a mild tone.