FLOWMASTER 817691 Holley Otl Dor 700042031023 V8 409S

( Brand: Flowmaster ), ( Manufacturer Part Number: 817691 ), ( UPC: 700042031023 )

Review FLOWMASTER Holley Ford V8 Otl Dors fits F150 2009–2014

Introducing the Flowmaster 817691 Exhaust System, specifically designed for the Ford F-150 V8 OTL (Over the Cab) models from 2009 to 2014. This exhaust system, equipped with Holley 409S Dorbis Mufflers, is an excellent upgrade for those seeking improved performance and a richer exhaust note.

The Flowmaster 817691 system is engineered to deliver a balanced and resonated exhaust flow, ensuring optimal power and torque throughout the RPM range. The 409S Dorbis Mufflers are known for their unique design that utilizes a series of internal passages to create a pulse-modulated exhaust flow. This results in a deep, rumbling exhaust note that is both pleasing to the ear and indicative of a high-performance exhaust system.

Manufactured using premium-grade materials, this exhaust system is built to withstand the rigors of daily driving while delivering reliable and consistent performance. The system is constructed from mandrel-bent stainless steel tubing, ensuring a smooth exhaust flow and reducing the likelihood of exhaust leaks. The mufflers and tips are also crafted from stainless steel, ensuring durability and resistance to corrosion.

The installation process is made easy with the inclusion of all necessary hardware and detailed installation instructions. The system also comes with a unique design feature - the ability to be used in both cat-back and full-system configurations, providing flexibility for those looking to upgrade their exhaust system in stages.

In summary, the Flowmaster 817691 Exhaust System with Holley 409S Dorbis Mufflers is an excellent choice for Ford F-150 V8 OTL owners seeking improved performance and a richer exhaust note. With its high-quality materials, unique muffler design, and flexible installation options, this exhaust system is sure to exceed your expectations and provide years of reliable performance.

The Flowmaster 817691 Holley 09-14 Ford F150 V8 OTL DOR 409S DOR is a performance exhaust system designed to enhance the sound and power of your Ford F150. Here are some pros and cons of purchasing this exhaust system:

1. Enhanced Performance: The 409S DOR series exhaust system is designed to improve engine breathing, resulting in increased horsepower and torque. This can lead to better acceleration and overall improved performance.

2. Improved Sound: The Flowmaster mufflers are known for their unique and aggressive exhaust note. This exhaust system is no exception, and you can expect a louder and more aggressive exhaust sound.

3. Durable Construction: The exhaust system is made of high-quality 304 stainless steel, which is known for its strength and resistance to rust and corrosion. This ensures that the system will last for a long time, even in harsh weather conditions.

4. Easy Installation: The exhaust system comes with all necessary hardware for installation, making it a relatively easy DIY project for most mechanically inclined individuals.

5. Increased Fuel Efficiency: By improving exhaust flow and reducing backpressure, this exhaust system can help improve fuel efficiency, resulting in savings at the gas pump.

1. Loud Exhaust Note: While some people may find the aggressive exhaust note appealing, others may find it excessive. If you value a quieter ride, this exhaust system may not be for you.

2. Higher Cost: Compared to stock exhaust systems or cheaper aftermarket options, the Flowmaster 817691 Holley 409S DOR series exhaust system is more expensive.

3. Potential for Drone: Depending on the RPM range, some users have reported a droning sound from the exhaust system. However, this can be minimized by properly installing the mufflers and using the provided resonators.

The Flowmaster 817691 Holley 09-14 Ford F150 V8 OTL DOR 409S DOR exhaust system offers significant performance improvements, a unique and aggressive exhaust note, and durable construction. However, it comes with a higher cost and may not be suitable for those who value a quieter ride. Ultimately, the decision to purchase this exhaust system comes down to personal preferences and priorities.

If you are looking for a performance exhaust system that delivers power gains, improved sound, and durability, the Flowmaster 817691 Holley 09-14 Ford F150 V8 OTL DOR 409S DOR exhaust system is an excellent choice. However, be prepared for a louder exhaust note and a higher cost compared to other options. If you are unsure about the installation process, consider hiring a professional to ensure proper installation and minimize the potential for droning.

part # 817691 prices

• $199.90-$1177.95

specifications frazzlekits:

• for models: F150
• for makes: Ford
• for years: 2009-2014
• brand: Flowmaster
• manufacturer part number: 817691
• upc: 700042031023

seller frazzlekits:

• rating: 98.3%
• # reviews: 1339

general frazzlekits:

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

returns frazzlekits:

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

payments frazzlekits:

• wallet: Paypal
• credit card: Discover
• other

offer frazzlekits:

• quantity: 2
• sold: 0
• started: October 17, 2025
• availability: In Stock
• options: Ship-to-home

shipping frazzlekits:

• type: Fixed
• class: Standard
• transit: 4-6 Days
• service: Standard
• cost: $0.00

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