STIHL 1141 140 4400 HD2 Air Filter – Genuine OEM Heavy-Duty Filter

The STIHL 1141 140 4400 HD2 Air Filter is a genuine STIHL OEM heavy-duty (HD2) air filter designed to protect your engine by trapping fine dust and debris in demanding cutting conditions. HD2 filters are built for long service life and excellent filtration performance, making them ideal for high-output STIHL chainsaws used in heavy wood cutting, dusty environments, and professional workloads.

This is a new, factory-original STIHL air filter — not aftermarket — and is sold by an authorized STIHL dealer.

⚠️ Fitment varies by model version and production year. Always confirm by part number before ordering.

Product Overview

• Brand: STIHL (OEM)

• STIHL Part Number: 1141 140 4400

• Filter Type: HD2 (Heavy-Duty) Air Filter

• Application: Chainsaw air filtration system

• Condition: New, factory original

• OEM: Genuine STIHL

Why Replace Your Air Filter?

A dirty or damaged air filter can cause:

• Loss of power and poor throttle response

• Hard starting and rough running

• Increased fuel consumption

• Premature engine wear

Replacing the air filter helps restore proper airflow and protects the engine from abrasive dust.

Fits STIHL Models (Fitment Must Be Confirmed)

This HD2 filter is used on select STIHL chainsaws and configurations, including models such as:

• STIHL MS 261 / MS 261 C-M / MS 261 C-Q / MS 261 C-MQ

• STIHL MS 271 / MS 271 Farm Boss

• STIHL MS 291 / MS 291 C-BEQ

• STIHL MS 311

• STIHL MS 362 / MS 362 C-M / MS 362 C-MQ / MS 362 C-Q / MS 362-R (and variants)

• STIHL MS 391

• STIHL MS 241 C-M

• STIHL MS 400 C-M

Because STIHL often changes components by serial range and version, do not rely on model name alone.

✅ Correct way to verify: your parts diagram or existing filter should reference 1141 140 4400.

How to Confirm This Filter Fits Your Saw (Recommended)

Before ordering, confirm one of the following:

1. Your current filter shows 1141 140 4400, or

2. Your STIHL parts breakdown lists Air Filter – 1141 140 4400

If you’re unsure, contact P&P Small Engines with your saw’s model and serial number, and we’ll help verify fitment.

Key Features & Benefits

• Genuine STIHL OEM HD2 Filter
  Correct fit and performance to STIHL factory specifications.

• Heavy-Duty Filtration
  Designed to capture fine debris in demanding environments.

• Improved Engine Protection
  Helps reduce internal wear from dust and contaminants.

• Restores Airflow & Performance
  Helps maintain correct air/fuel mixture and cutting power.

• Not Aftermarket
  OEM quality for correct sealing and filtration.

Frequently Asked Questions (FAQ)

Is this a genuine STIHL HD2 air filter?
Yes. This is a genuine STIHL OEM HD2 air filter, part number 1141 140 4400.

Will this fit my MS 261 / MS 271 / MS 291 / MS 362?
It is used on many versions of those models, but fitment must be confirmed by part number because STIHL changes parts by version and serial range.

What does HD2 mean?
HD2 refers to STIHL’s heavy-duty air filter design, built for strong filtration and extended service life.

When should I replace my air filter?
Replace it when it’s damaged, won’t clean properly, or airflow is restricted and performance drops.

Common Search Terms This Product Matches

• STIHL HD2 air filter

• STIHL 1141 140 4400

• MS 261 HD2 filter

• MS 271 Farm Boss air filter

• MS 291 air filter HD2

• MS 362 HD2 air filter