1955-57 Thunderbird 304 Stainless Steel muffler. Offset inlet is 2.000″ ID and the offset outlet is 1.750″ OD. Chambered turbo muffler. All muffler internals are also 304 stainless steel for a lifetime of consistent sound and performance. For the great subtle muscle car sound. Fits all 1955-57 T-Bird systems.