STIHL Muffler / Exhaust Assembly – OEM 1122 140 0604
Genuine STIHL Exhaust for MS 640, MS 650 & MS 660 Chainsaws
Restore power, efficiency, and proper exhaust flow with this genuine STIHL muffler (OEM part number 1122 140 0604). Designed for STIHL MS 640, MS 650, and MS 660 chainsaws, this exhaust assembly / silencer ensures optimal engine performance while safely directing exhaust gases away from the operator.
🔧 Product Overview
The STIHL MS660 muffler 1122 140 0604 is a critical engine component that controls exhaust flow, reduces noise, and supports proper combustion efficiency. Built to STIHL’s exact OEM standards, this chainsaw exhaust system helps maintain engine power output, fuel efficiency, and safe operation.
Constructed from high-quality, heat-resistant metal, this muffler is designed to withstand extreme temperatures and heavy-duty forestry use. It is a direct OEM replacement, ensuring a precise fit with no modifications required.
If your existing muffler is clogged, damaged, or worn, replacing it with this genuine STIHL part restores engine performance, reduces excessive noise, and improves overall reliability.
✅ Key Features
- Genuine STIHL OEM Part – Guaranteed fit, quality, and durability
- Part Number: 1122 140 0604 (also listed as 11221400604)
- High-Temperature Resistant Construction – Built for heavy-duty use
- Optimized Exhaust Flow – Maintains engine efficiency and power output
- Noise Reduction Design – Helps reduce engine noise during operation
- Direct Replacement Fit – Installs easily using existing mounting points
- Durable Steel Construction – Long service life in harsh environments
- Improves Engine Performance – Restores proper combustion and airflow
⚙️ Compatibility
This STIHL muffler / exhaust assembly fits:
- STIHL MS 640
- STIHL MS 650
- STIHL MS 660
(Always confirm part number before purchase to ensure compatibility.)
🛠️ Typical Applications
- Replacing clogged, damaged, or worn mufflers
- Restoring engine power and exhaust efficiency
- Reducing excessive noise and emissions
- Chainsaw servicing and engine rebuilds
- Professional forestry, logging, and heavy-duty cutting
🔄 Also Known As
- STIHL muffler
- Chainsaw exhaust
- Chainsaw silencer
- Exhaust assembly STIHL
- Engine exhaust housing
🌲 Why Choose Genuine STIHL Parts?
Using a genuine STIHL exhaust 1122 140 0604 ensures:
- Perfect OEM fit and performance
- Reliable operation under heavy workloads
- Proper exhaust flow and engine efficiency
- Longer lifespan compared to aftermarket alternatives
📦 Product Specifications
- Manufacturer: STIHL
- Part Number: 1122 140 0604
- Alternate Format: 11221400604
- Part Type: Muffler / Exhaust Assembly
- Material: Heat-resistant steel
- Unit of Sale: 1
- Machine Type: Chainsaw
- Fits Brand: STIHL
🚚 Built for Professional Use
This STIHL MS660 muffler replacement is ideal for professional loggers, arborists, landscapers, and serious users who demand high performance and durability from their chainsaw.
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