Vibrant 1142 3" Ultra Quiet Resonator Designed to dampen exhaust noise Facilitates undisrupted exhaust flow Constructed from t304 stainless steel Features a "true straight through" perforated core Withstands high exhaust temperature Inlet Diameter: 3 inches / Outlet Diameter: 3 inches Body Width: 6.5 inches x 4.75 inches / Body Length: 9.75 inches