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Exhaust Mufflers and Resonators

Flowmaster

Flow Fx Direct Fit Dual Mode Muffler With Active Valve Fits 2019-2026 (New Body) Silverado/Sierra 1500 5.3L, 2/4 Wd, All Wheelbases Aggressive To Moderate Sound Flowmaster

$1,068.95 $999.95 Save $69.00

SKU: F00L 717911

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In Stock
Ships by Aug 5
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 717911

Introducing the new Flow FX Active Dual-mode muffler featuring our new W.A.V.E. Technology (Wireless Active Valve Exhaust ) for all 2019-2026 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 Flow FX 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 Flow FX 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. Maximum dyno gains of 9 hp and 11 lb.ft. at the rear wheels. Note: Fits 2019 (New body) 2/4 wheel drive and all wheelbases.Deep Performance Tone from straight-through FlowFX MufflerMax Dyno Gains of 9 hp and 11 lb.ft. of TorqueFeatures Flowmasters W.A.V.E. TechnologyVery Aggressive Active By-Pass SoundMandrel-bent Stainless Steel TubingWireless Controlled Actuator MotorDetailed Installation InstructionsDirect-fit Replacement MufflerIncludes a High Quality ValveStainless Steel ConstructionIncludes Two Key Fobs

Features:

  • Deep Performance Tone from "Straight-through" FlowFX Muffler
  • Deep Performance Tone From Flowfx Muffler
  • Max Dyno Gains of 9 hp and 11 lb.ft. of Torque
  • Very Aggressive Tone With Active By-pass
  • Features Flowmasters W.A.V.E. Technology
  • Wireless Controlled Actuator Motor
  • Very Aggressive Active By-Pass Sound
  • Direct-fit Replacement Muffler
  • Mandrel-bent Stainless Steel Tubing
  • Stainless Steel Construction
  • Wireless Controlled Actuator Motor
  • Includes Two Key Fobs
  • Detailed Installation Instructions
  • Direct-fit Replacement Muffler
  • Includes a High Quality Valve
  • Stainless Steel Construction
  • Includes Two Key Fobs

FlowFX Direct Fit Muffler Kit | Single | Dual Out Rear Exit | Incl. 3 in. Tubing/3 in. Round Tip | 409 Stainless Steel | w/Active Valve

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

MIA's Description

The Flowmaster FlowFX Direct-Fit Muffler (MPN: 717911) is a performance exhaust component designed for 2019-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. This system features a straight-through FlowFX muffler that produces a moderate-to-aggressive exhaust tone, characteristic of the Flowmaster sound. It is constructed from durable T-409 stainless steel, ensuring resistance to rust and corrosion. The mandrel-bent tubing is engineered for maximum exhaust flow, which has been dyno-tested and proven to increase horsepower and torque. The kit is designed for easy, at-home installation, utilizing factory hanger locations and including all necessary hardware.

Fitment

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Specifications

BrandFlowmaster
Part NumberF00L 717911

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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