Caterpillar Part reference
Caterpillar part number 2717657 is listed as a muffler group in the air inlet and exhaust system, muffler group subgroup, for the Caterpillar C9 model. The catalog context refers to a 271-7657 muffler gp with serial number c9e1-up and residential application notes, and this listing describes it as an attachment.
Recorded applications
Selected catalog references that list this part. A catalog association does not confirm fitment for every machine or configuration.
Catalog context
LockedCheck the signed-in Part Book for available diagrams and the complete catalog breakdown.
| Part number | Description |
|---|---|
| 2717657 | muffler group (current part) |
| 2S***93 | precleaner cover assembly |
| 2S***08 | collector-dust; (air precleaner) |
| 5P***00 | pipe clamp |
Selected entries from this catalog unit. Other part numbers are masked. Confirm the full breakdown and your machine configuration before ordering.
Browse Caterpillar modelsGeneral guidance
In general, a muffler group is part of an engine's exhaust system that reduces noise by routing exhaust gases through internal chambers and baffles before they leave the machine. Its condition and mounting affect sound levels, backpressure and how the exhaust system fits the engine.
When ordering, confirm that 2717657 matches the existing part number and the recorded conditions: serial number c9e1-up, residential application, and the attachment note shown for 271-7657. The catalog listing does not establish compatibility for every machine configuration, so verify the engine serial number and application before purchase.
