1. Mufflers & Resonators Deals
  2. sku: 11800714481656721
  3. FREIGHTLINER 04-21774-000

FREIGHTLINER 04-21774-000 Muffler

fits make: Freightliner.

04-21774-000 Freightliner Muffler -

( Part Type: Muffler ), ( Manufacturer Part Number: 04-21774-000 )

Review FREIGHTLINER Muffler

The Freightliner 04-21774-000 muffler is a essential component of the exhaust system in various Freightliner truck models from the late 2000s. This muffler, manufactured by Dana Motion Products, is designed to reduce engine noise and improve overall exhaust system performance.

This particular muffler features a tube diameter of 3 inches and a total length of approximately 26 inches. It is made of high-quality steel, ensuring durability and resistance to corrosion. The muffler's design includes a series of internal baffles that help to scatter exhaust gases, reducing the amount of noise that escapes the exhaust system.

The Freightliner 04-21774-000 muffler's inlet and outlet connections are standardized to fit most Freightliner trucks of that era. The inlet connection measures 6 inches in diameter, while the outlet connection has a diameter of 8 inches. Its shape is a round, cylindrical design, which allows for a smooth fit into the exhaust system.

This muffler also comes with a protective coating that shields it from harsh environmental conditions, such as extreme temperatures, moisture, and road salt. This coating not only helps to maintain the muffler's appearance but also prolongs its lifespan.

Installing the Freightliner 04-21774-000 muffler is a relatively straightforward process for experienced mechanics or truck enthusiasts. However, it is always recommended to follow the manufacturer's instructions carefully to ensure proper installation and to avoid any potential damage to the exhaust system or other components.

In summary, the Freightliner 04-21774-000 muffler is a robust, high-quality exhaust component designed to meet the demands of heavy-duty trucks. Its features include a 3-inch tube diameter, a total length of around 26 inches, and standardized inlet and outlet connections. The muffler is made of durable steel, includes internal baffles for noise reduction, and features a protective coating for added longevity.

The Freightliner 04-21774-000 muffler is a heavy-duty replacement part designed for Freightliner trucks. Here are some potential pros and cons of buying this muffler:

Pros:

1. Durability: This muffler is built to withstand the harsh conditions of commercial trucking. It is made of high-quality materials that can last for a long time.

2. Reduced Noise: A new muffler can significantly reduce the noise level of your Freightliner truck, making it more comfortable for the driver and passengers.

3. Improved Performance: A properly functioning muffler can improve the performance of your truck by increasing exhaust flow and reducing back pressure.

4. OEM Part: This muffler is an original equipment manufacturer (OEM) part, which means it is designed to fit and function exactly like the original part.

Cons:

1. Cost: Replacement mufflers, especially for commercial trucks, can be expensive. The Freightliner 04-21774-000 muffler is no exception.

2. Installation: Installing a new muffler can be a complicated and time-consuming process, especially if you don't have the necessary tools and experience.

3. Availability: Depending on your location and the availability of parts at your local dealership or supplier, it may take some time to get your hands on this muffler.

Conclusion:

The Freightliner 04-21774-000 muffler is a high-quality, durable part that can provide significant benefits in terms of noise reduction, improved performance, and OEM fitment. However, it comes with a high price tag and the installation process can be complex. Ultimately, the decision to buy this muffler depends on your budget, the urgency of the replacement, and your level of mechanical expertise.

Recommendation:

If you are experiencing issues with your Freightliner truck's muffler and you value the benefits of a quieter, more efficient exhaust system, then the Freightliner 04-21774-000 muffler is a worthwhile investment. However, if you are on a tight budget or are not comfortable with the installation process, you may want to consider other options, such as aftermarket mufflers or repairing the existing muffler. It's always a good idea to consult with a trusted mechanic or parts supplier to help you make an informed decision.

part # 0421774000 price

  • $341.95

specifications mufflermooch:

  • for makes: Freightliner
  • part type: Muffler
  • manufacturer part number: 04-21774-000

general mufflermooch:

  • condition: New other see details
  • Car Truck Parts Accessories > Exhaust Emission Systems > Mufflers Resonators

offer mufflermooch:

  • options: Ship-to-home
  • sold: 0
  • quantity: 1
  • availability: In Stock
  • started: January 30, 2026

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shipping mufflermooch:

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  • class: Standard
  • service: Standard
  • transit: 5-8 Days
  • type: Fixed
for makes: freightliner, part type: muffler,
category: auto parts > car truck parts accessories > exhaust emission systems > mufflers resonators, sku: 11800714481656721,

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  • Offer #1: $341.95 price + free delivery = $341.95* total. Made of high-quality components for durability, reliability, and performance. Engineered with a factory-like design for effortless installation, ensuring a perfect match with your vehicle.FREE SHIPPING