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  3. FLOWMASTER 817139

FLOWMASTER 817139 American Crossmember Exhaust 700042024308

fits model: Thunder.

817139 Flowmaster American Thunder Crossmember-back Exhaust System

( Brand: Flowmaster ), ( Type: Crossmember-back ), ( Material: 409 Stainless Steel ), ( Finish: Natural ), ( UPC: 700042024308 ), ( Manufacturer Part Number: 817139 )

Review FLOWMASTER American Crossmember back Exhaust System fits THUNDER

The Flowmaster American Thunder 817139 Crossmember-Back Exhaust System is a high-performance aftermarket exhaust solution designed for select Ford, Lincoln, and Mercury vehicles. This system is engineered to deliver an impressive increase in power and torque while providing a distinctive and deep exhaust note.

The American Thunder 817139 system is a cat-back exhaust, which means it replaces the catalytic converter and the rear exhaust components. The system is made of premium 409 stainless steel, ensuring durability and resistance to corrosion. The exhaust piping features a mandrel bend design, which guarantees maximum flow and minimal restriction for optimal engine performance.

One of the most notable features of this exhaust system is its unique and aggressive exhaust note. The Flowmaster American Thunder mufflers are specifically designed to provide a balance between power and sound, resulting in a deep, throaty exhaust tone that is sure to turn heads. The mufflers utilize Flowmaster's patented "Series 61" and "Series 71" muffler technology, which allows for maximum power and minimal backpressure.

The American Thunder 817139 system also includes all necessary hardware for installation, including exhaust hangers, clamps, and mounting brackets. The installation process is designed to be straightforward and can typically be completed in a few hours by an experienced home mechanic.

Additionally, the Flowmaster American Thunder 817139 system is CARB-legal, which means it meets the stringent emissions standards set by the California Air Resources Board. This makes it a great choice for those who live in California or other states with similar regulations.

In summary, the Flowmaster American Thunder 817139 Crossmember-Back Exhaust System is a high-quality, high-performance exhaust solution that delivers increased power and torque while providing a distinctive and aggressive exhaust note. It is made from premium stainless steel, features mandrel bends for maximum flow, and includes all necessary hardware for easy installation. Plus, it is CARB-legal for those living in emissions-regulated areas.

Flowmaster American Thunder Crossmember-Back Exhaust: A Comprehensive Analysis

The Flowmaster 817139 American Thunder Crossmember-Back Exhaust is a popular choice among car enthusiasts for its unique sound and performance enhancement. In this analysis, we will discuss the pros and cons of investing in this exhaust system.

Pros:

1. Improved Performance: One of the primary reasons for purchasing a Flowmaster American Thunder Crossmember-Back Exhaust is the performance enhancement it offers. The exhaust system improves engine breathing, resulting in increased horsepower and torque.

2. Unique Sound: The Flowmaster American Thunder series is renowned for its distinctive sound. This exhaust system delivers a deep and resonant tone that is sure to please car enthusiasts.

3. Durability: Flowmaster exhaust systems are known for their high-quality materials and construction. The American Thunder Crossmember-Back Exhaust is no exception. It is constructed from mandrel-bent 304 stainless steel, making it highly resistant to rust and corrosion.

4. Fitment and Installation: The Flowmaster American Thunder Crossmember-Back Exhaust is designed to fit a wide range of vehicles. It comes with all necessary hardware and instructions for an easy installation process.

5. Enhanced Fuel Economy: Some users report improved fuel economy after installing this exhaust system, although this may vary depending on individual vehicle conditions.

Cons:

1. Expensive: The Flowmaster American Thunder Crossmember-Back Exhaust is a premium product, and its price reflects its high-quality materials and performance benefits.

2. Loudness: The exhaust system is designed to deliver a loud and resonant sound, which may not be suitable for all drivers. If you value a quieter ride, this exhaust system may not be the best choice for you.

3. Required Maintenance: While the Flowmaster American Thunder Crossmember-Back Exhaust is highly durable, it may require occasional maintenance to ensure optimal performance. This includes regular cleaning and occasional replacement of gaskets or other components.

4. Potential Drone: At certain RPMs, some users report a drone or resonance from the exhaust system. This can be mitigated by adjusting the exhaust tips or using a muffler.

Conclusion:

The Flowmaster American Thunder Crossmember-Back Exhaust is an excellent choice for car enthusiasts seeking improved performance, a unique sound, and a high-quality exhaust system. While it comes with a premium price tag and may require occasional maintenance, its benefits far outweigh the drawbacks for many users.

Recommendation:

If you are looking for a high-performance exhaust system that delivers a unique sound and enhances the overall driving experience, the Flowmaster American Thunder Crossmember-Back Exhaust is an excellent choice. However, consider your personal preferences and budget before making a decision. If you value a quieter ride or are on a tight budget, there may be other options better suited to your needs.

part # 817139 price

  • $1024.95

specifications frazzlekits:

  • for models: Thunder
  • brand: Flowmaster
  • type: Crossmember-back
  • material: 409 Stainless Steel
  • finish: Natural
  • upc: 700042024308
  • manufacturer part number: 817139

payments frazzlekits:

  • wallet: Paypal
  • other
  • credit card: Visa

shipping frazzlekits:

  • service: UPS Ground
  • cost: $0.00
  • transit: 2-6 Days
  • carrier: UPS
  • class: Standard
  • type: Fixed

returns frazzlekits:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer

offer frazzlekits:

  • quantity: 1
  • availability: In Stock
  • started: May 1, 2025
  • sold: 0
  • options: Ship-to-home

general frazzlekits:

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

seller frazzlekits:

  • # reviews: 14702
  • rating: 98.8%
for models: thunder, type: crossmember-back, finish: natural,
category: auto parts > car truck parts accessories > exhaust emission systems > exhaust system kits, material: 409 stainless steel, sku: 4252931427080632,

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