One New Aftermarket Replacement Muffler Fits Caterpillar (Fits CAT) Crawler Dozers, Loaders, and Pipelayers

This aftermarket replacement muffler (part number 6N0731) is a direct-fit exhaust muffler Fits Caterpillar (Fits CAT) D7G series crawler tractors, 977L track loaders, and 571G/572G pipelayers powered by the 3306 engine. It replaces OEM part number 9S9996 and is sold individually as a single unit.

Compatible Models

Fits Caterpillar Crawler Dozers: D7, D7F, D7G, D7G LGP (D7GLGP), D7G SA (D7GSA) -- Powershift and Direct Drive variants with 3306 engine

Fits Caterpillar Crawler Loaders: 977L

Fits Caterpillar Pipelayers: 571G, 572G

Note: Serial number prefixes confirmed to use this muffler include 94N, 45W, 72W, 65W, and 44W. Consult your parts book to confirm fitment for your specific serial number.

Replaces Part Number(s):

6N0731, 9S9996, MUK40-0080

New aftermarket replacement part - not remanufactured, not used.