Flowmaster

Flowmaster 717977 FlowFX Extreme Cat-Back Exhaust System Stainless 3.0 in Single Exit

Compatible with 2019-2021 Chevrolet® Silverado®/ GMC® Sierra® 1500 Trucks 5.3L V8. This product is not created or sold by GM®. Fits 2/4 wheel drive and all wheelbases.

Part # 717977
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$314.95
Suggested Retail
$350.00
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5

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.

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Flowmaster® introduces our FlowFX® Extreme stainless steel cat-back exhaust system for the 2019*-2021 (* 2019 New Body Only) 1500-series trucks with the 5.3L engine. This system uses a FlowFX® series muffler for an aggressive to moderate sound level and increased performance. 3.00-inch mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. The system has a turndown style, dump exit right after the muffler to eliminate the over-axle tailpipe. This elimination of the tailpipe helps improve ground clearance and departure angle when you are driving in more extreme off-road situations. This system produced max dyno gains of 15 hp and 20 lb-ft at the rear wheels. 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:

  • FlowFX Series performance muffler offers an aggressive to moderate sound level and increased performance
  • 409 stainless steel construction delivers extra durability and improved long-term corrosion resistance
  • Max dyno gains of 15 hp and 20 lb-ft at the rear wheels
  • 3.00-inch 16-gauge mandrel bent stainless steel tubing helps maintain maximum exhaust flow for better power
  • Includes all necessary hardware for an at home installation
  • Dump style exit allows for better ground clearance when in extreme off-road conditions
  • Uses factory hanger locations for easy installation
  • Backed by Flowmaster’s Lifetime Limited Warranty
Brand Flowmaster
Emission Code5
Exhaust SeriesFlowFX
Exit PositionSingle Outlet Dump (SOD)
Mount TypeUses Factory Hangers
Muffler Body Length (in)14.0
Muffler ColorNatural
Muffler FinishBrushed
Muffler Inlet Diameter (in)3.0
Muffler Inlet LocationCentered
Muffler Material409S Stainless Steel
Muffler Outlet Diameter (in)3.0"
Muffler Overall Length (in)44
Muffler Quantity1
Muffler SeriesFlowFX
Muffler ShapeRound
Muffler TypeAbsorption
Product TypeCat-Back Exhaust Systems
QuantitySold as a Kit
Sound LevelModerate/Aggressive
Tip CutTurndown
Tip Diameter3.0
Tip Edge StyleCut
Tip FinishN/A
Tip Length (in)N/A
Tip LogoN/A
Tip MaterialN/A
Tip QuantityN/A
Tip ShapeN/A
Tip StyleNot Included
Tubing Diameter (in)3.0
Tubing Material409S Stainless Steel
UPC090127130827
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
Part Number717977
5

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.
Fits 2/4 wheel drive and all wheelbases.

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.