Flowmaster Catback 409S – FlowFX Kit – DOSS – Moderate/Aggressive Sound Ford


SKU: 717785 Categories: , ,


Introducing Flowmaster’s new line of FlowFx® Catback exhaust systems for 2015-2019 Ford F-150 with 2.7L/3.5L Ecoboost, 3.5L TiVCT or 5.0L engines. This dual 2.50-inch system is perfect for the person looking for a moderate to aggressive exterior and interior sound level with all of the performance benefits that you would expect from Flowmaster®. Features include all stainless steel mandrel-bent tubing flowing into a FlowFx straight-through performance muffler for maximum power and a deep aggressive sound. The system is then finished off with dual 2.50-inch tailpipes with dual 4.00-inch black ceramic coated stainless steel tips exiting in front of the rear passenger tire giving it that muscle truck look. Designed for easy installation, this system includes all necessary parts, hardware and detailed instructions. Notes: Fits all 2/4 wheel drives and wheelbases except std cab/short bed. Note: Does not fit the 3.5L Raptor trucks.


  • FlowFx “straight-through” Performance Muffler
  • Dyno Tuned For Maximum Performance
  • Full Stainless Steel Construction
  • Moderate/Aggressive Sound
  • Lifetime Limited Warranty
  • Easy Installation


  • Brand: Flowmaster
  • California Proposition 65 Chemical Name: Chromium
  • California Proposition 65 Chemical Name: Lead
  • California Proposition 65 Required: Yes
  • Catalytic Converter Included: No
  • Emission Code: 5
  • Exhaust Series: FlowFx
  • Exit Position: DOSS
  • Heat Shield: No
  • Mount Type: Uses Factory Hangers
  • Muffler Finish: Natural
  • Muffler Inlet Diameter (in): 3
  • Muffler Material: 409S Stainless Steel
  • Muffler Outlet Diameter (in): 2.5
  • Muffler Part Number: Kit Only
  • Muffler Quantity: 1
  • Muffler Series: FlowFx
  • Muffler Shape: Oval
  • Muffler Type: Absorbtion
  • Product Type: Exhaust Systems / Kits
  • Single Dual: Dual
  • Sound Level: Moderate/Aggressive
  • System Type: Catback
  • Tip Cut: Angle
  • Tip Diameter (in): 4
  • Tip Edge Style: Cut
  • Tip Finish: Polished
  • Tip Length (in): 13
  • Tip Logo: Embossed
  • Tip Material: 304 Stainless
  • Tip Quantity: 2
  • Tip Shape: Round
  • Tip Style: Double Wall
  • Tubing Diameter (in): 2.5
  • Tubing Material: 409S Stainless Steel
  • Warning: California Proposition 65


  • 2015-2019 Ford F-150 with 2.7L/3.5L Ecoboost, 3.5L TiVCT or 5.0L engines. Does not fit the 3.5L Raptor trucks.


Additional information










6 Cylinder 3.5 Liter


Single Inlet; Dual Out Side Exit; Incl. 3 in. Tubing/Straight Through Mufflers/4.5 in. Round Black Ceramic Coated Tips; 409 Stainless Steel;50 State Legal / California Emissions Compliant


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