These are NOS vintage thrush California red glass pack mufflers. Will work with any 3 inch flange for headers comes with bolts and header gasket and washers and nuts in package. 29 1/4 inches long 2 1/4 inch inside diameter at outlet. Make sure to check out all photos as they will answer most if not all questions. If you have a question just message me. I will be glad to answer it. Thanks for looking. Price is for both mufflers.