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Flowmaster Outlaw Dual Exhaust System - Side/Rear Exit (14-18 5.3L Silverado 1500)

AmericanTrucks no longer carries the Flowmaster Outlaw Dual Exhaust System - Side/Rear Exit (14-18 5.3L Silverado 1500). Please check out 2014-2018 Silverado 1500 Exhaust Systems for an updated selection.

Features, Video & Details

  • Aggressive Race-Level Sound
  • Significantly Improves Horsepower and Torque
  • Delta Flow™ Super 10 Series Welded Baffle Muffler
  • 3-in. Mandrel Bent Stainless Steel Tubing
  • 4-in. Black Ceramic Coated Exhaust Tips
  • Split Side Behind Rear Wheels or Dual Rear Exit
  • Bolt-On Installation
  • Designed for Double and Crew Cab Models
  • Not Compatible with 2WD Crew Cab Models with 2-Piece Driveshaft
  • Fits 2014 to 2018 Chevrolet Silverado 1500 5.3L Models

Review & Installation Video

Review & Install Video

Race-Inspired Aggressive Sound. The Flowmaster Outlaw Cat-Back Exhaust is designed to deliver aggressive sound levels both internally and externally. This lets enthusiasts experience Flowmaster’s renowned sound while also enjoying their exhaust’s performance-boosting characteristics. Due to the sound levels emitted, this system is not intended for street driving. As a bonus, the exits can be configured as either split side or dual rear for flexible customization.

High-Performance Exhaust. Flowmaster’s patented Delta Flow™ technology and the precision-machined mandrel-bent tubing dramatically improve scavenging and exhaust flow to improve your truck’s performance.  Each system is dyno-tuned for the best performance.

High-Quality Materials and Construction. Like other Flowmaster products, the Outlaw is made from high-grade stainless steel and built to last. Additionally, the black ceramic coated tips add a rugged finished look to your truck.

Direct Fit Replacement Upgrade. The Outlaw is precisely designed to fit your application and requires no additional fabrication. The installation utilizes the factory mounting point to simplify the process. And while not required, Flowmaster recommends welding the slip-fit connections for a more secure installation.

Application. The Flowmaster Outlaw Cat-Back Exhaust with split side or rear exit is designed to fit Fits 2014 to 2017 Chevrolet Silverado 1500 5.3L models with either Double or Crew Cab. It’s not compatible with 2WD Crew Cab models with the 2-piece driveshaft.

Fitment: 2014 2015 2016 2017 2018 Details

MPN# 817689

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Inlet Pipe
  • (1) 6.5’ Bed Extension
  • (1) Muffler
  • (1) Tailpipe, Right
  • (1) Tailpipe, Left Front
  • (1) Tailpipe, Left Rear
  • (2) Side Exit Pipes (Right and Left)
  • (2) Rear Exit Pipes (Right and Left)
  • (2) Stainless Tips
  • Installation Hardware
Installation Info
Will it fit my Silverado 1500?

    Customer Photos

      Questions & Answers (1)

      1 Top Rated Question

      With adding a new exhaust system on the truck will that help with save on gas as well as make it sound better

      • The effect on your gas mileage will be negligible. Unless you are looking at headers, you should be focusing purely on the sound you desire.

      Helpful (0)
      Post Your Question

        Customer Reviews (3) Write a Review

        Overall Rating 4.7

        out of 5 stars

        Installation Time:Afternoon

        • Loudness / Volume 5 5
        • Exhaust Note 5 5
        • Fit & Finish 4.333333 4.3
        • Bang For Your Buck 4.333333 4.3

        • 4/5

          Installation Time: Afternoon

          January 16, 2019

          Perfect exhaust. Something wrong with install

          Install took longer than expected because opening in the tips were a little smaller than the outside of the rear exit pipes. Also the clamps took an air gun to tighten which I still feel wasn’t enough. Besides that though I love the sound of this exhaust inside and out. Little to no drone which keeps my cab staying quiet. Ceramic coated black tips are the ish and the sound again is just wanted I wanted if I was spending this money. Along with the 409 stainless. American made deserves flowmaster.


          Year: 2018 Submodel: LT Engine: 5.3L V8

          Helpful (4)

        • 5/5

          Installation Time: Afternoon

          November 07, 2018

          Sounds really good

          If you have a neighbor that lives 20ft away and you wake up early in the morning for work. You may want to consider one with a bigger muffler. Not an obnoxiously loud in the cabin.


          Year: 2018 Submodel: LT Engine: 5.3L V8

          Helpful (8)

        • 5/5

          Installation Time: Afternoon

          September 26, 2018

          Awesome kit!

          Got the kit installed and sounds great! Gave me a about 3mpg gaines when paird with a CAI


          Year: 2017 Engine: 5.3L V8

          Helpful (9)

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