When I first bought my ‘73 Cuda, those round Thrush mufflers were the only sound deadener on the exhaust system placed at the rear of the car at the rear valance exit. View attachment 1715818085
Those things were loud and cheap. Wesold a lot of Walker Corvair Turbo mufflers. #21348 The original turbo muffler. Short, oval, quiet, and not very restrictive.