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  3. FLOWMASTER 817390

FLOWMASTER 817390 American Exhaust 700042027385

fits model: Thunder.

817390 Flowmaster American Thunder Exhaust System

( Brand: Flowmaster ), ( Type: Exhaust Gt; Exhaust Kits And Systems ), ( UPC: 700042027385 ), ( Manufacturer Part Number: 817390 )

Review FLOWMASTER American Exhaust System fits THUNDER

The Flowmaster American Thunder Exhaust System, model number 817390, is a high-performance aftermarket exhaust solution designed to enhance the sound and overall performance of your vehicle. This system is engineered for specific makes and models, ensuring a perfect fit and optimal functionality.

The American Thunder exhaust is renowned for its distinctive deep, rumbling exhaust note, which is achieved through the use of Flowmaster's patented muffler design. These mufflers, featuring a series of internal tubes, allow for maximum exhaust gas flow while minimizing unwanted noise. The result is an exhilarating exhaust note that is sure to turn heads.

This system is constructed from premium materials, including mandrel-bent stainless steel tubing. This design ensures that the exhaust flows smoothly and evenly, reducing backpressure and maximizing engine performance. The stainless steel construction also ensures durability and resistance to rust and corrosion, ensuring that your exhaust system looks and performs great for years to come.

The American Thunder exhaust system is a direct replacement for your vehicle's original exhaust system, making installation a straightforward process. The system comes with all necessary hardware and instructions, and can typically be installed in a few hours with common hand tools.

In addition to its performance benefits, the Flowmaster American Thunder Exhaust System also offers a number of aesthetic advantages. The polished stainless steel finish looks great on any vehicle, and the increased exhaust flow can lead to a more visible exhaust tip.

Overall, the Flowmaster American Thunder Exhaust System is an excellent choice for anyone looking to enhance the performance and appearance of their vehicle. With its distinctive exhaust note, premium construction, and straightforward installation process, this system is sure to exceed your expectations.

Pros and Cons of Buying a Flowmaster American Thunder Exhaust System (817390)

The Flowmaster American Thunder Exhaust System (817390) is a popular choice for those looking to enhance their vehicle's performance and sound. Here are some potential advantages and disadvantages to consider before making a purchase.

Pros:

1. Enhanced engine performance: A well-designed exhaust system like the American Thunder can help increase horsepower and torque by reducing backpressure and improving overall engine efficiency.

2. Unique sound: The Flowmaster mufflers in this system are known for their distinctive deep, rumbling exhaust note that many enthusiasts find appealing.

3. Improved fuel efficiency: By reducing backpressure and improving exhaust gas flow, the American Thunder system could potentially help improve fuel economy.

4. Durable construction: The system is made from high-quality materials, such as mandrel-bent stainless steel tubing, which ensures both strength and longevity.

5. Easy installation: Many customers report that the installation process for the American Thunder system is relatively straightforward and can be completed in a few hours with basic hand tools.

Cons:

1. Cost: The Flowmaster American Thunder Exhaust System (817390) can be quite expensive compared to some other aftermarket exhaust options, especially for larger vehicles or complex systems.

2. Loudness: Depending on personal preference, some people might find the exhaust note from the American Thunder system to be excessively loud, which could potentially lead to noise complaints or nuisance violations in certain areas.

3. Potential for drone or resonance: While the deep exhaust note is appealing to many, some users have reported experiencing drone or resonance at certain RPMs or cruising speeds, which can be distracting or annoying.

4. Potential for increased exhaust heat: The American Thunder system, with its free-flowing design, can generate more exhaust heat than stock systems, which could potentially lead to increased cabin temperature or discomfort.

Conclusion:

The Flowmaster American Thunder Exhaust System (817390) offers several advantages, such as improved engine performance, a unique exhaust note, and durable construction. However, it also comes with some potential disadvantages, such as cost, loudness, potential drone or resonance, and increased exhaust heat. Ultimately, the decision to purchase this exhaust system depends on individual preferences, budget, and specific vehicle requirements.

Recommendation:

Before making a purchase, carefully consider the pros and cons listed above, as well as your personal preferences and budget. It may also be helpful to research customer reviews, installation guides, and compatibility with your specific vehicle model and make. If you are looking for a high-performance exhaust system with a distinctive sound, the Flowmaster American Thunder Exhaust System (817390) could be an excellent choice. However, if you are sensitive to loud exhaust notes or prefer a more subtle upgrade, it might be worth exploring other options.

part # 817390 price

  • $1075.95

specifications frazzlekits:

  • for models: Thunder
  • brand: Flowmaster
  • type: Exhaust Gt; Exhaust Kits And Systems
  • upc: 700042027385
  • manufacturer part number: 817390

seller frazzlekits:

  • # reviews: 47075
  • rating: 99.2%

payments frazzlekits:

  • other
  • credit card: Visa
  • wallet: Google-pay

shipping frazzlekits:

  • service: UPS Ground
  • transit: 3-7 Days
  • type: Fixed
  • cost: $0.00
  • carrier: UPS
  • class: Standard

offer frazzlekits:

  • sold: 0
  • started: April 21, 2025
  • options: Ship-to-home
  • availability: In Stock

returns frazzlekits:

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

general frazzlekits:

  • Car Truck Parts Accessories > Exhaust Emission Systems > Exhaust System Kits
  • condition: New
for models: thunder, type: exhaust gt; exhaust kits and systems,
category: auto parts > car truck parts accessories > exhaust emission systems > exhaust system kits, sku: 4027156650550772,

Flowmaster 817390 Is Similar To:

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5 offers $1075.95–$1075.95 USD
  • Offer #1: $1075.95 price + free delivery = $1075.95* total. Super 40 Series Mufflers for Deep Powerful Sound. Moderate to Aggressive Exterior Exhaust Tone.FREE SHIPPING
  • Offer #2: $1075.95 price + free delivery = $1075.95* total. Flowmaster Exhaust System Kit - Fits 1968 to 1970 Mopar B-Body with a V8 engine.FREE SHIPPING
  • Offer #3: $1075.95 price + free delivery = $1075.95* total. Does Not include header reducer cones or downpipes for factor manifolds 1968-1970 Mopar B-bodies with V8 engine, 2.5" Stainless Steel - Aggressive to moderate sound.FREE SHIPPING
  • Offer #4: $1075.95 price + free delivery = $1075.95* total. mandrel-bent stainless steel tubing and includes an H-pipe to balance the exhaust pulses and to eliminate back-rap on deceleration Compatible with 1968-1970 Mopar B-bodies with V8 engine.FREE SHIPPING
  • Offer #5: $1075.95 price + free delivery = $1075.95* total. Designed for an easy fit,. The American Thunder system is for the person who is looking for a complete Crossmember-Back dual exhaust system with a deep powerful sound.FREE SHIPPING