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Flow FX Extreme Single Exit Cat-Back Exhaust System for 2019-2026 Chevrolet Silverado, GMC Sierra 5.3L [409 Stainless Steel]
InfoVehicle Info Needed
FLOWMASTERPART NUMBER: 389-717977

Flow FX Extreme Single Exit Cat-Back Exhaust System for 2019-2026 Chevrolet Silverado, GMC Sierra 5.3L [409 Stainless Steel]

$39995
1 left in stock
ShippingShips on Nov 02, 2026
Lowest PriceLowest Price Guarantee

GM Truck
Flow FX Extreme Single Exit Cat-Back Exhaust System
  • 2019-2026 Chevrolet Silverado 1500 LTD, Silverado 1500, GMC Sierra 1500 Limited, Sierra 1500
  • 5.3L
  • 3 in. Piping
  • Single Exit
  • 3 in. Stainless Tips
  • 409 Stainless Steel
  • Sold as a Kit

    The Flow FX Extreme cat-back system for 2019-2026 Chevrolet Silverado 1500 LTD, Silverado 1500, GMC Sierra 1500 Limited, Sierra 1500 replaces the factory exhaust behind the catalytic converter with 3 in. mandrel-bent 409 stainless steel tubing, a straight-through muffler and 3 in. stainless tips, for aggressive sound.

    Flowmaster 717977 Features:

    • 3 in. mandrel-bent 409 stainless steel tubing in 16-gauge.
    • Single Exit with 3 in. stainless tips.
    • Flow FX series straight-through muffler for aggressive sound.
    • Clamps and factory-style hangers for the stock locations are included.

    Flowmaster 717977 Applications:

    • 2019-2026 Chevrolet Silverado 1500 5.3L
    • 2019-2026 GMC Sierra 1500 5.3L
    • 2022 Chevrolet Silverado 1500 LTD 5.3L
    • 2022 GMC Sierra 1500 Limited 5.3L

    Emissions: 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.

    • Extreme Off-Road, High-Clearance Exhaust Upgrade 

      Flowmaster FlowFX Extreme Series Exhaust Kits give your vehicle the exhaust sound you want without offending the entire neighborhood. These dump-style exit systems eliminate the tailpipe after the rear axle for better performance and ground clearance. Mandrel-bent, 16-gauge, 409S stainless steel ensures durability and corrosion resistance, and the 3.0 in. diameter tubing allows maximum flow.   

    Part TypeExhaust System
    Product LineFlowmaster FlowFX Extreme Series Exhaust Systems
    BrandFLOWMASTER
    Package Height9.75
    Package Width15.25
    Package Length49.0
    Weight19.0 PG
    Muffler Body Diameter6 in (152.4 mm)
    Tailpipe Diameter (In.)3
    Muffler Inlet Inside Diameter3 in (76.2 mm)
    Hangers IncludedYes
    Main Piping Diameter3 in (76.2 mm)
    Tail Pipe Quantity1
    Inlet TypeClamp-On
    Inlet Size (In.)3
    Exhaust Tip Material409 Stainless Steel
    Catalytic Converter Quantity0
    Exit LocationUnderbody
    Muffler Body Length14 in (355.6 mm)
    Sound LevelAggressive
    Muffler Body Material409 Stainless Steel
    Hanger IncludedYes
    Exhaust Tip CutStraight
    Gasket Or Seal IncludedNo
    Exhaust Tip IntercooledNo
    Pipe ColorSilver
    Muffler Quantity1
    Muffler Inlet Outside Diameter3.13 in (79.5 mm)
    Exit QuantitySingle
    Muffler Flanged OutletNo
    Exhaust Tip ResonatedNo
    Muffler Outlet LocationCenter
    Catalytic Converter IncludedNo
    Part CategoryPerformance Parts
    Hardware IncludedYes
    Exhaust Tip WallSingle Wall
    Exhaust Tip Quantity1
    Muffler Inlet LocationCenter
    Exhaust Tip FinishNatural
    Exhaust Tip EdgeSlash Cut
    Valve IncludedNo
    Muffler TypeAbsorption
    Pipe Material409 Stainless Steel
    Tail Pipe Tapered OutletNo
    Exit PositionTurn Down
    Gauge16
    Muffler Body ShapeRound
    Mounting Bracket IncludedNo
    Muffler Outlet Quantity1
    Muffler FinishNatural
    Mount TypeUses Factory Hangers
    Clamps IncludedYes
    Horse Power Increase15 HP
    FinishNatural
    Exit StyleSingle Out Dump
    Tip IncludedYes
    Clamping TypeFlat Band
    Muffler Flanged InletNo
    Mandrel-BentYes
    Spring Bolt Kit IncludedNo
    Muffler SeriesFlow FX
    QuantitySold as a Kit
    Muffler IncludedYes
    Exhaust Tip ConnectionWelded
    System StyleCat-back
    Tail Pipe Outlet Outside Diameter3 in (76.2 mm)
    Muffler ConfigurationCenter/Center
    System Material409S Stainless Steel
    Valve TypeNot Applicable
    Tip ShapeRound
    Exhaust Tip Diameter3 in (76.2 mm)
    Part FitmentDirect Fit
    Vendor Part Number717977
    Package Qty1
    Package TypeEA

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