Photo - Primary
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - Primary
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package
Photo - out of package

21-26 Ford F-150 2.7L/3.5L/5.0L Flowmaster 817979 American Thunder Cat-Back Exhaust System

Flowmaster 817979 delivers an aggressive performance tone, improved exhaust flow, and durable stainless steel construction for 2021-2026 Ford F-150 trucks. Featuring a Super 40 Series muffler, Delta Flow Technology, and customizable dual exit options, this cat-back exhaust system enhances performance styling with easy factory-style installation and Flowmaster Lifetime Limited Warranty coverage.

Top Features

  • American Thunder cat-back exhaust system designed for performance sound and improved airflow.
  • Super 40 Series muffler provides a deep, aggressive exhaust tone.
  • Maximum dyno gains of 11 HP and 10 LB.FT. at the rear wheels.
  • Delta Flow Technology helps increase performance and reduce exhaust drone.
  • Mandrel-bent 409 stainless steel tubing improves durability and exhaust flow.
  • Dual exit design includes rear and side exit tailpipe options.
  • Features polished 3.50-inch stainless steel exhaust tips for a classic performance appearance.
  • Uses factory hanger locations for an easier installation process.
  • Clears the factory spare tire location.
  • Backed by Flowmaster’s Lifetime Limited Warranty.

Vehicle Fitment

  • 2021-2026 Ford F-150 with 2.7L engine.
  • 2021-2026 Ford F-150 with 3.5L EcoBoost engine.
  • 2021-2026 Ford F-150 with 5.0L engine.
  • Fits 2-wheel drive and 4-wheel drive models.
  • Does not fit regular cab models with 6.5-foot bed.
  • Does not fit Hybrid PowerBoost models.
  • Does not fit models equipped with OEM active exhaust option.
Vendor: Flowmaster
SKU: FLO817979
Availability: 21 In Stock
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Better hurry, only 21 left in stock.
Questions? Ask an MPT Expert
Lowest Price Guarantee
Add to wishlist

Secure Shopping with Hassle Free Returns

Free Shipping on orders over $149

10 customers are viewing this product
UPC: 090127130179
  • More Power Tuning
  • More Power Tuning

Proposition65 Warning: Cancer and Reproductive Harm

Description

Flowmaster 817979 American Thunder Cat-Back Exhaust System

The Flowmaster 817979 American Thunder Cat-Back Exhaust System delivers a powerful combination of aggressive sound, enhanced exhaust flow, and durable stainless steel construction for 2021-2026 Ford F-150 trucks equipped with 2.7L, 3.5L, and 5.0L engines. Designed with a Super 40 Series performance muffler, this exhaust system produces a deep, performance-oriented tone while utilizing Delta Flow Technology to improve performance and reduce unwanted exhaust drone. The mandrel-bent 409 stainless steel tubing helps maximize airflow and long-term durability, while the dual exit design allows customization with both rear and side exit tailpipe options. With factory mounting locations, included installation hardware, and a Lifetime Limited Warranty from Flowmaster, this cat-back exhaust system is an ideal upgrade for truck owners seeking a classic performance appearance and enhanced driving experience.

Key Features

  • Designed for 2021-2026 Ford F-150 trucks with 2.7L, 3.5L, and 5.0L engines.
  • American Thunder Series cat-back exhaust system with a Super 40 Series performance muffler.
  • Produces a deep and aggressive performance exhaust tone.
  • Includes rear and side exit tailpipes for customizable exhaust appearance.
  • Uses factory hanger locations for a straightforward installation.
  • Mandrel-bent 409 stainless steel tubing maximizes exhaust flow and durability.
  • Delta Flow Technology helps improve performance and reduce exhaust drone.
  • Provides maximum dyno gains of 11 HP and 10 LB.FT. at the rear wheels.
  • Clears the factory spare tire location.
  • Includes polished stainless steel exhaust tips with a classic performance appearance.

Benefits

  • Improves the overall performance character of the Ford F-150 with increased exhaust flow.
  • Provides a bold, aggressive exhaust sound while maintaining drivability.
  • Enhances the truck’s exterior styling with polished stainless steel tips and dual exit options.
  • Offers long-lasting corrosion resistance with stainless steel components.
  • Allows installation without requiring custom fabrication by using factory mounting points.
  • Includes all required hardware for installation convenience.
  • Backed by Flowmaster’s Lifetime Limited Warranty for added product confidence.

Product Specifications

  • Brand: Flowmaster
  • Part Number: 817979
  • Product Type: Cat-Back Exhaust System
  • Exhaust Series: American Thunder
  • Exhaust Grade: Performance
  • Material: 409 Stainless Steel tubing and muffler body
  • Exhaust Tip Material: 304 Stainless Steel
  • Finish: Natural stainless steel finish
  • Exhaust Tip Finish: Polished
  • Exhaust Tip Color: Silver
  • Exhaust Tip Diameter: 3.50 inches
  • Exhaust Tip Quantity: 2
  • Tail Pipe Diameter: 2.50 inches
  • Main Piping Diameter: 2.50 inches
  • Muffler Series: Super 40 Series
  • Muffler Type: Chambered
  • Muffler Body Shape: Oval
  • Muffler Body Dimensions: 5.00 inches height x 10.00 inches width x 10.25 inches length
  • Muffler Overall Length: 16.50 inches
  • Muffler Finish: Black high-temperature paint finish
  • Exit Style: Dual Out Rear and Dual Out Side
  • Installation Type: Uses factory hangers
  • Clamping Type: Flat Band
  • Sound Level: Aggressive / Moderate
  • Catalytic Converter Included: No
  • Valve Included: No
  • CARB Compliant: Yes
  • Emission Code: 5

Install Difficulty Level

Easy installation. This Flowmaster cat-back exhaust system is designed to use factory mounting locations and includes the necessary hardware for a smooth installation. Installation can typically be completed in approximately 1 hour, making it a convenient upgrade for enthusiasts looking to improve their truck’s sound and appearance.

Vehicle Fitment

  • 2021-2026 Ford F-150 with 2.7L engine
  • 2021-2026 Ford F-150 with 3.5L EcoBoost engine
  • 2021-2026 Ford F-150 with 5.0L engine
  • Fits 2-wheel drive and 4-wheel drive models
  • Does not fit regular cab models with 6.5-foot bed
  • Does not fit Hybrid PowerBoost models
  • Does not fit models equipped with OEM active exhaust option

For questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.

Shipping & Returns

Shipping Policy

MPT is proud to offer free shipping on most orders over $149.

  • Free shipping applies only to the contiguous United States. Shipping and handling charges will apply to orders outside the contiguous US, and the buyer is responsible for any duty fees or taxes their home country may charge to import goods.
  • With free shipping, we will choose the best shipping method for your order. We use all major carriers, including USPS, FedEx, UPS, and DHL.

Turnaround Times:

  • MPT Tunes have a standard turnaround time of 2-3 business days, beginning once we receive your MPT Tune Form.
  • We do not process orders on weekends or observed holidays, which do not count as business days.
  • Physical items that are in stock at MPT and ordered by 4PM EST will be shipped the same day. Orders placed after 4PM EST will be processed on the following business day.

Special Considerations:

  • Items not stocked at our location will follow the same processing times but may experience lead-time delays and could incur additional charges. Shipping methods may vary for these items based on what was paid and the requested delivery speed. If you need an item by a specific deadline, please contact an MPT Expert.
  • SCT Tuner Orders with the Prioritized Order option must have their tune forms submitted by 3PM EST to be completed the same day. Forms submitted after this time will be processed the next business day.
  • Orders will ship to the billing address listed on your order. If paying by credit or debit card, we can only ship to the billing address. Contact an MPT Expert for assistance if you need a different shipping address.

MPT Performance Returns and Refund Policy

A Return Authorization Number is required for all returns. Please contact an MPT Expert to obtain an RA # before sending anything back to us for any reason.

MPT tuning charges and license fees are Non-Refundable. The sale is final when MPT has sent the tune file over email. This includes both new tune purchases and tune updates.

Products other than MPT tunes, digital products, and MPT decals may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed it is non-refundable. We reserve the right to deny the return, should the product be received and it display signs of installation or unmentioned damage.

For vehicle programmers/tuners, the vehicle must be returned to stock if a program was installed. If a tuning device is returned and has not been returned to stock, a refund will not be issued, and your tuner will not be sent back without a shipping and handling fee.

The customer is responsible for all shipping charges incurred during the return process.

Amount Refunded:
•Returns post marked before 30 days from the date the item was received will be refunded the purchase price, minus a 25% restocking fee and the cost of shipping.
•After 30 days, all sales are Final.
•Shipping charges along with any package insurance are non-refundable. If your purchase was shipped with our Free Shipping option, the cost of the shipping will be subtracted from the total refund amount.

HP Tuners Credits are assigned to the HP Tuners product with the submitted serial number and cannot be transferred. Once you load a tune to your vehicle with the RTD, these credits are Non-Refundable.

Digital products and files that have no ability to be taken back physically, such as an SCT Tuner Unlock, are Non-Refundable.

nGauge Tune License Fee is included in your initial purchase of MPT tunes for the nGauge. This fee is factored into the price of the tunes and becomes Non-Refundable when the stock file has been emailed to MPT.

MPT Decals are Non-Refundable, once they have been received by the customer.

Reviews

Related Products

Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00
Example product title
$ 1,049.95 USD
On-Sale $ 1,049.95 USD
Normally $ 1,049.95 USD
Save $ 0.00

Recently Viewed Products