Flowmaster® (19-21) Silverado/Sierra 409SS FlowFX Cat-Back System (Crew/Double Cab)

  • Sale
  • Regular price $630.95

Compatible: (5.3L)

2019 - 2021 Chevy Silverado (NEW BODY STYLE)

2019 - 2021 GMC Sierra  (NEW BODY STYLE)


Does Not Fit Crew Cab 2WD with 2 Pc Driveshaft or trucks with factory dual tailpipes.

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.


Our new Flowmaster® FlowFX® cat-back exhaust system is manufactured using durable 409 stainless steel throughout and features a 3.00-inch inlet pipe leading to a single inlet/dual outlet FlowFX "straight-through" muffler for great sound and maximum performance. The dual 2.50-inch mandrel bent tailpipes exit out the side at an angle behind the rear wheels directing exhaust away from your boat or travel trailer when towing. The system is finished off with a pair of large 4.50-inch diameter black ceramic coated 304S stainless steel tips, giving your truck a custom look that goes hand in hand with that deep performance FlowFX sound. The system uses all the existing factory hanger locations and includes an additional hanger to install the new left side tailpipe. Includes installation instructions and all necessary hardware for an easy installation that you can do at home. Note: Fits 2wd and 4wd models.


  • Large 4.50-inch Black Ceramic Coated Stainless Steel Tips
  • Deep Powerful Tone Inside and Outside the Vehicle
  • FlowFX "Straight-through" Performance Muffler
  • All Mandrel-bent Stainless Steel Tubing
  • Uses the Factory Hanger Locations
  • Includes All Necessary Hardware
  • Full Stainless Steel Construction
  • Easy at Home Installation
  • Lifetime Limited Warranty


    Brand Flowmaster
    Catalytic Converter Included No
    Emission Code 5
    Exhaust Series FlowFX
    Exit Position Dual Side Exit
    Heat Shield No
    Material 409 Stainless Steel
    Mount Type Uses Factory Hangers
    Muffler Body Length (in) 18
    Muffler Color Natural
    Muffler Finish Brushed
    Muffler Inlet Diameter (in) 3
    Muffler Inlet Location Centered
    Muffler Material 409S Stainless Steel
    Muffler Outlet Diameter (in) 2.5
    Muffler Outlet Location Dual Outlet
    Muffler Overall Length (in) 24
    Muffler Part Number Kit Only
    Muffler Quantity 1
    Muffler Series FlowFX
    Muffler Shape Oval
    Muffler Type Absorption
    Product Type Exhaust System
    Single Dual Dual
    Sound Level Aggressive / Moderate
    System Type Cat-back
    Tip Cut Angle
    Tip Diameter (in) 4.5
    Tip Edge Style Rolled
    Tip Finish Black Ceramic
    Tip Length (in) 11
    Tip Logo Embossed
    Tip Material 304 Stainless
    Tip Quantity 2
    Tip Shape Round
    Tubing Diameter (in) 2.5
    Tubing Material 409S Stainless Steel
    California Proposition 65 Chemical Name Chromium (hexavalent compounds)
    Nickel (Metallic)
    California Proposition 65 Required Yes
    Part Number 717893

    Install Guide: