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Flowmaster 817979 American Thunder Cat-Back Exhaust System

(2021-2025 Ford F-150)

Part of: Flowmaster American Thunder Cat-Back Exhaust System

Other options in this family: Flowmaster 17395 Flowmaster 817568 Flowmaster 17213 Flowmaster 818196 Flowmaster 818176

Manufacturer

Picture for manufacturer Flowmaster

Part Number

817979
6 reviews
Sale Price

$1,049.95

4 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Flowmaster 817979 American Thunder Cat-Back Exhaust System delivers exceptional performance gains and an aggressive exhaust note for enthusiasts seeking both power and sound. This complete system features mandrel-bent tubing that maximizes exhaust flow, helping to unlock up to 11 horsepower and 10 lb-ft of torque at the rear wheels.

Key Features:

  • Super 40 Series performance muffler produces a deep, aggressive tone
  • Delta Flow technology increases performance while reducing interior drone
  • Stainless steel construction throughout for maximum durability and corrosion resistance
  • 3.50-inch polished stainless steel tips deliver a classic performance appearance
  • Includes both rear exit and side exit tailpipes for customizable styling options
  • Mandrel-bent tubing maintains consistent diameter for optimal exhaust flow
  • Uses factory hanger locations for straightforward bolt-on installation
  • Designed to clear factory spare tire mounting
  • Backed by Flowmaster's limited lifetime warranty

This cat-back system is engineered to provide the perfect balance of performance, sound, and style. The Super 40 muffler is known for its aggressive exterior sound while Delta Flow technology helps minimize cabin drone during highway cruising. Choose between rear or side exit tailpipes to customize the final appearance to your preferences.

Products specifications

Fits

2021-2025 Ford F-150

Tail Pipe Diameter

2.500 in

Tip Diameter

3.500 in.

Tubing Diameter

3.500 in.

Inlet Inside Diameter

3.500 in.

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name

Nickel (Metallic)

Material

409 Stainless Steel

Exit Position

Rear

Exhaust Type

Cat-Back

Brand

Flowmaster

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

Flat Band

Clamps Included

Yes

Emission Code

5

Exhaust Series

American Thunder

Exhaust Tip Color

Silver

Exhaust Tip Connection

Clamp-On

Exhaust Tip Cut

Angled

Exhaust Tip Edge

Angle Cut

Exhaust Tip Finish

Polished

Exhaust Tip Intercooled

No

Exhaust Tip Material

304 Stainless Steel

Exhaust Tip Quantity

2

Exhaust Tip Resonated

No

Exhaust Tip Shape

Round

Exhaust Tip Wall

Single Wall

Exit Style

Dual Out Side

Exit Style

Dual Out Rear

Finish

Natural

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Inlet Type

Clamp-On

Mount Type

Uses Factory Hangers

Mounting Bracket Included

Yes

Muffler Body Length

10.25

Muffler Body Material

409 Stainless Steel

Muffler Body Shape

Oval

Muffler Color

Black

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Inlet Location

Center

Muffler Outlet Connection

Slip-Fit

Muffler Outlet Location

Dual

Muffler Outlet Quantity

1

muffler part number

Kit Only

Muffler Quantity

1

Muffler Series

Super 40 Series

Muffler Type

Chambered

Pipe Color

Silver

Pipe Material

409 Stainless Steel

Product Type

Exhaust System

Sound Level

Aggressive / Moderate

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

Dual

Tail Pipe Quantity

2

Tail Pipe Tapered Outlet

No

Tip Logo

Embossed

Tip Style

Double wall

Type

Cat-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

Great experience

Finding the part was super easy and simple. The only issue I really had was the delay in the shipping. I paid extra for faster shipping and it still took over a week to get to me. When I tried contacting them through the chat I never got any feedback after asking questions just a "let me check that for you" then chat ended. I finally decided to email and then I got a reply basically saying the same thing. Correct part did wind up showing up without tracking update(kept showing sent to warehouse).

Easy and very competitive pricing

Fast easy and best price. Free shipping!

Only website that had the specific tire I required. Thank you. Cheers.

Easy transaction, lowest price on the net

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