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Flowmaster

Flowmaster American Thunder Cat-Back Exhaust System

Part # 817979 Be the first to write a review

Fits 2021-2025 Ford F-150 2.7L, 3.5L, 5.0L. American Thunder, Cat-Back, Dual Exit Stainless Steel Exhaust System

Flowmaster American Thunder Cat-Back Exhaust System

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This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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Flowmaster introduces our new American Thunder stainless steel cat-back exhaust system for the 2021-2025 Ford F-150 with the 2.7L, 3.5L and 5.0L engines. This system uses a Super 40 series muffler for a deep powerful sound and increased performance. Maximum dyno gains of 11 HP and 10 LB.FT. at the rear wheels. Mandrel bent 409 stainless steel tubing is used for maximum exhaust flow and durability. The system has a 3.0-inch inlet pipe and dual 2.5-inch tailpipes with both side exit and rear exit options that allow you to customize the look of the kit. 3.5-inch polished stainless steel tips finish off the kit for a classic performance look. All of the necessary hardware is included and factory-mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty.

Features:

  • Includes Both Rear and Side Exit Tailpipes so the Final Look can be Customized
  • Super 40 Series Performance Muffler Delivers a Deep and Aggressive Performance Tone
  • Uses the Factory Hanger Locations for an Easy Installation
  • Clears the Factory Spare Tire
  • Stainless Steel Construction adds Durability
  • 3.50-Inch Polished Stainless Steel Tips add a Classic Performance Look
  • Delta Flow Technology Increases Performance and Reduces Drone
  • Mandrel-bent Tubing Maximizes Exhaust Flow
  • Maximum Dyno Gains of 11 HP and 10 LB.FT. at the Rear Wheels
  • Lifetime Limited Warranty
Brand Flowmaster
Catalytic Converter Quantity0
CategoryExhaust
Clamping TypeFlat Band
Clamps IncludedYes
Emission Code5
Exhaust SeriesAmerican Thunder
Exhaust System Kit TypeCat-Back
Exhaust Tip ColorSilver
Exhaust Tip ConnectionClamp-On
Exhaust Tip CutAngled
Exhaust Tip Diameter3.50 IN
Exhaust Tip EdgeAngle Cut
Exhaust Tip FinishPolished
Exhaust Tip IntercooledNo
Exhaust Tip Length13.00 IN
Exhaust Tip Material304 Stainless Steel
Exhaust Tip Quantity2
Exhaust Tip ResonatedNo
Exhaust Tip ShapeRound
Exhaust Tip WallSingle Wall
Exit PositionDOR/S
Exit StyleDual Out Rear
Dual Out Side
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Inlet TypeClamp-On
Main Piping Diameter2.50 IN
Material409 Stainless Steel
Mount TypeUses factory hangers
Mounting Bracket IncludedYes
Muffler Body Height5.00 IN
Muffler Body Length10.25 IN
Muffler Body Material409 Stainless Steel
Muffler Body ShapeOval
Muffler Body Width10.00 IN
Muffler ColorBlack
Muffler FinishBlack High-Temperature Paint Finish
Muffler Flanged InletNo
Muffler Flanged OutletNo
Muffler Inlet ConnectionSlip-Fit
Muffler Inlet Diameter3.00 IN
Muffler Inlet Inside Diameter3.00 IN
Muffler Inlet LocationCenter
Muffler Inlet Outside Diameter3.13 IN
Muffler Material409 Stainless Steel
Muffler Outlet ConnectionSlip-Fit
Muffler Outlet Diameter2.50 IN
Muffler Outlet LocationDual
Muffler Outlet Quantity1
Muffler Overall Length16.50 IN
Muffler Part NumberKit Only
Muffler Quantity1
Muffler SeriesSuper 40 Series
Muffler ShapeOval
Muffler TypeChambered
part typeExhaust System Kit
Pipe Material409 Stainless Steel
Product TypeExhaust System
Single DualDual
Sound LevelAggressive / Moderate
Spring Bolt Kit IncludedNo
Sub CategoryExhaust and Tail Pipes
System TypeCat-back
Tail Pipe Outlet Outside Diameter2.50 IN
Tail Pipe Quantity2
Tail Pipe Tapered OutletNo
Tip CutAngle
Tip Diameter3.50 IN
Tip Edge StyleCut
Tip FinishPolished
Tip Length13.00 IN
Tip LogoEmbossed
Tip Material304 Stainless Steel
Tip Quantity2.00
Tip ShapeRound
Tip StyleDouble Wall
Tubing Diameter2.50 IN
Tubing Material409 Stainless Steel
TypeCat-Back
Valve IncludedNo
Valve TypeNot Applicable
UPC090127130179
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817979
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This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Instructions - 817979_Instructions.pdf
Instructions - fm_warranty_general.pdf
2021-2025 Ford f-150 Trucks with 2.7L, 3.5L Ecoboost, 3.5L Ti-VCT and 5.0L engines. Fits 2 & 4-wheel drive. Does not fit regular cab with 6.5' bed. Does not fit hybrid Powerboost models. Does not fit models with OEM active exhaust option.

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