NEW Muffler, part number 9s9996 or 6N0731 ,for a Caterpillar D7G , 571G , 572G , 977L crawler dozer, loader and some pipelayers. Consult you parts book to make sure this is what is called for on your machine.
Serial Number's on machines that begin with : 94N 45W 72W 65W 44W and more have this muffler.
Fits:
