Flowmaster

Flowmaster 717890 FlowFX Cat-Back Exhaust System Stainless 3.5 to Dual 2.5 in

Compatible with 2019-2021 GM® Silverado®/Sierra® 1500 6.2L V8. This product is not created or sold by GM®. Fits 2/4 wheel drive and all wheelbases.

Part # 717890
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$619.95
Suggested Retail
$689.00
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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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The new Flowmaster® FlowFX® cat-back exhaust system is manufactured using durable 409 stainless steel throughout and features 3.5-inch to dual 2.50-inch mandrel bent pipes for better exhaust gas flow, and a FlowFX "straight-through" muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +26 hp and +39 lb.ft at the rear wheels. This system fits all wheelbases and connects to the factory exhaust tips that exit in the rear bumper for a stealthy look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. Backed by Flowmaster's Lifetime Limited Warranty.

Features:

  • Max Increases of up to 26 hp and 39 lb.ft. over the stock exhaust at the rear wheels
  • 3.5-inch and 2.5-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Connects to the factory dual exhaust tips for a stealthy look
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • FlowFX “straight through” performance muffler delivers a deep, moderate performance tone and improves exhaust flow
  • Backed by Flowmaster’s Lifetime Limited Warranty
Brand Flowmaster
Emission Code5
Exhaust SeriesFlowFX
Exit PositionDual Out Side
Mount TypeUses Factory Hangers
Muffler Body Length (in)18
Muffler ColorNatural
Muffler FinishBrushed
Muffler Inlet Diameter (in)3.5
Muffler Inlet LocationCentered
Muffler Material409S Stainless Steel
Muffler Outlet Diameter (in)2.50
Muffler Overall Length (in)24
Muffler Quantity1
Muffler SeriesFlowFX
Muffler ShapeOval
Muffler TypeAbsorption
Product TypeCat-Back Exhaust Systems
QuantitySold as a Kit
Sound LevelModerate
Tip StyleNot Included
Tubing Diameter (in)2.5/3.5
Tubing Material409S Stainless Steel
UPC090127107867
Manufacturer Part Number717890
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
Part Number717890
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.