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  3. FLOWMASTER L158574

FLOWMASTER L158574 Exhaust Kit 743593978195

fits model: F-350. make: Ford. year: 1999–2004.

L158574 Flowmaster Exhaust System Kit For Ford F-350 Super Duty 1999-04

( Brand: Flowmaster ), ( Manufacturer Part Number: L158574 ), ( Fitment Type: Direct Fit ), ( System Type: Cat-back ), ( Material: Aluminized Steel ), ( Single Dual: Single ), ( Heat Shield: No ), ( Sound Level: Mild/moderate Sound ), ( UPC: 743593978195 )

Review FLOWMASTER Exhaust System Kit Ford Super Duty fits F-350 1999–2004

Introducing the Flowmaster L158574 Exhaust Kit, a high-performance aftermarket exhaust solution specifically designed for the Ford F-350 pickup trucks from 1999 to 2004. This exhaust system is not just an upgrade for better sound, but also delivers enhanced power and improved fuel efficiency.

The L158574 kit comes with a 409S Stainless Steel muffler, which is known for its deep, throaty sound. It is constructed from premium T-304 stainless steel. This material ensures superior strength, durability, and resistance to corrosion. The muffler design provides a perfect balance between sound and flow, offering an aggressive exhaust note without sacrificing cabin noise levels.

The exhaust kit features mandrel-bent tubing, which allows for a smooth, uninterrupted exhaust flow. This results in increased horsepower and torque, enhancing the overall performance of your Ford F-350. The tubing is also made from T-304 stainless steel, ensuring a perfect fit and a long-lasting solution.

The kit includes all necessary hardware for installation, making the process as seamless as possible. It also includes a set of OEM-style, multi-position exhaust tips, giving your truck a more aggressive appearance while maintaining the factory look.

Additionally, the Flowmaster L158574 Exhaust Kit is CARB-compliant, ensuring that it meets the emissions standards in California and other states with similar regulations. This makes it a smart choice for those looking to upgrade their exhaust system while staying environmentally responsible.

In summary, the Flowmaster L158574 Exhaust Kit offers a powerful and deep exhaust note, increased performance, and improved fuel efficiency for your Ford F-350 from 1999 to 2004. Made from high-quality T-304 stainless steel, it is a durable and long-lasting solution that comes with all necessary hardware for easy installation. Upgrade your truck today with the Flowmaster L158574 Exhaust Kit.

Flowmaster L1 Exhaust Kit for Ford F-350 (1999-2004): A Detailed Analysis

The Flowmaster L1 Exhaust Kit for Ford F-350 (1999-2004) is a popular aftermarket exhaust system upgrade. This analysis will cover the key advantages and disadvantages of investing in this exhaust system.

Advantages:

1. Enhanced Performance: The Flowmaster L1 exhaust system is designed to improve the overall performance of your Ford F-350. It allows for better exhaust flow, resulting in increased horsepower and torque.

2. Improved Sound: One of the primary reasons people choose Flowmaster exhaust systems is for their distinctive sound. The L1 muffler produces a deep, resonating exhaust note that is desirable for many truck enthusiasts.

3. Durability: Flowmaster exhaust systems are known for their high-quality materials and construction. The L1 exhaust kit for Ford F-350 is no exception, with its mandrel-bent stainless steel tubing and heavy-duty mufflers.

4. Increased Fuel Efficiency: While not a significant improvement, some users have reported a slight increase in fuel efficiency after installing the Flowmaster L1 exhaust system.

Disadvantages:

1. Cost: The Flowmaster L1 exhaust kit is a more expensive option compared to stock exhaust systems or other aftermarket alternatives. The price may be a deterrent for some potential buyers.

2. Installation Complexity: Installing the Flowmaster L1 exhaust system can be a challenging process, especially for those without prior experience in exhaust system upgrades. It may require professional installation to ensure proper fitment and function.

3. Increased Cabin Noise: While the exhaust note may be desirable when driving, some users have reported increased cabin noise when idling or at low speeds. This can be a drawback for those seeking a quieter driving experience.

Conclusion:

The Flowmaster L1 exhaust kit offers several advantages, including improved performance, distinctive sound, durability, and potential fuel efficiency gains. However, it also comes with some drawbacks, such as a higher cost, complex installation process, and increased cabin noise.

Recommendation:

If you are a Ford F-350 (1999-2004) owner seeking an exhaust system upgrade for increased performance and desirable sound, the Flowmaster L1 exhaust kit is an excellent choice. Keep in mind that the higher cost and potential installation challenges should be considered before making a purchase. It is recommended to weigh these factors against the desired benefits and, if possible, consult a professional for installation to ensure proper fitment and function.

part # l158574 price

  • $556.35

specifications frazzlekits:

  • for models: F-350
  • for makes: Ford
  • for years: 1999-2004
  • brand: Flowmaster
  • manufacturer part number: L158574
  • fitment type: Direct Fit
  • system type: Cat-back
  • material: Aluminized Steel
  • single dual: Single
  • heat shield: No
  • sound level: Mild/moderate Sound
  • upc: 743593978195

general frazzlekits:

  • condition: New
  • Car Truck Parts Accessories > Exhaust Emission Systems > Exhaust System Kits

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  • options: Ship-to-home
  • started: October 27, 2025
  • quantity: 3
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for models: f-350, for makes: ford, for years: 1999-2004, fitment type: direct fit, system type: cat-back, single dual: single, heat shield: no, sound level: mild/moderate sound,
category: auto parts > car truck parts accessories > exhaust emission systems > exhaust system kits, material: aluminized steel, sku: 8097456670074713,

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