CATEngine Parts

118-9906-360-7865 Muffler — Cat 320B

This muffler is designed to reduce exhaust noise and safely channel combustion gases away from the engine and operator. Constructed from heavy-gauge steel with internal baffling, it meets CAT's rigorous standards for durability and noise suppression, unlike a corroded or perforated muffler. Operators may experience a significant increase in exhaust noise, a loss of engine power, or the detection of exhaust fumes in the cabin when this component fails.

Muffler – Part No 118-9906-360-7865 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeMuffler
MaterialHeavy-gauge steel
ApplicationEngine exhaust system
Service LifeReplace as needed based on condition
CompatibilityCAT specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The most immediate symptom of a failing muffler is a sudden and significant increase in exhaust noise. If the damage progresses, exhaust gases may begin to leak, potentially entering the operator's cabin and causing a loss of engine power due to backpressure issues. Unaddressed, a severely damaged muffler can lead to excessive engine heat and potential damage to exhaust components.

Installation Tip

Ensure all exhaust system mounting points are clean and free of rust before installing the new muffler. Do not reuse old exhaust clamps, as they may not provide a secure seal.

Service Note

Inspect the entire exhaust system, including exhaust pipes, gaskets, and mounting hardware, for leaks or corrosion when replacing the muffler.