Flowmaster #717911 FlowFX Direct Fit Muffler Kit-Active Valve 19-20 GMC / CHEVROLET 1500

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  • Regular price $788.00 CAD
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2019-2020 (New body) GM Silverado/Sierra 1500 5.3L, 2/4 WD, All Wheelbases.
Introducing the new FlowFX® Active Dual-mode muffler featuring our new W.A.V.E. Technology™ (Wireless Active Valve Exhaust™) for all 2019-2020 GM Silverado/Sierra 1500 (new body style) with 5.3L engine. This direct-fit replacement muffler has split personalities with a nice performance tone over the stock exhaust system, thanks to the Flowmaster® FlowFX performance muffler. The system also features a high quality wireless controlled actuator valve on the Power Chamber® redirecting exhaust through the turn down, giving you that deep open exhaust sound with just a push of a button. System features include mandrel-bent stainless steel construction leading into the Power Chamber, followed by a round FlowFX performance muffler that easily connects to the factory tailpipe. The Power Chamber houses a wireless controlled valve with a large 3.00-inch turndown dump style tailpipe letting everyone know who the Boss is once activated. Other system features include actuator motor, control unit, two wireless key fobs, all necessary wiring, hardware, and detailed instructions. Note: Fits 2019 (New body) 2/4 wheel drive and all wheelbases.


  • Deep Performance Tone from "Straight-through" FlowFX Muffler
  • Features Flowmasters W.A.V.E. Technology
  • Very Aggressive Active By-Pass Sound
  • Mandrel-bent Stainless Steel Tubing
  • Wireless Controlled Actuator Motor
  • Detailed Installation Instructions
  • Direct-fit Replacement Muffler
  • Includes a High Quality Valve
  • Stainless Steel Construction
  • Includes Two Key Fobs
Brand Flowmaster
Emission Code 5
Exhaust Series FlowFX
Exit Position Dual Out Rear
Heat Shield No
Material 409 Stainless Steel
Mount Type Uses Factory Hangers
Product Type Exhaust System
Single Dual Single
Sound Level Moderate/Aggressive
System Type Direct-Fit Muffler
Tip Cut Turndown
Tip Diameter 3
Tip Length 10
Tip Material 409 Stainless Steel
Tip Shape Round
Tip Style Round
Single Wall
Tubing Diameter (in) 3
Tubing Material 409S Stainless Steel
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 Required Yes
Part Number