Guaranteed Free Delivery by 12/24! available on most items - Details

Talk to a Silverado Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your Silverado! Enter daily!
Cyber Monday Prices Still Live Shop Now

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

Item S104238
Market Price $1,017.99 You Save 12% ($118.04)
Our Price

$899.95 (kit)

FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    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 (2)

        2 Top Rated Questions

        Will putting this on void my warranty on my truck sorry first time purchasing a new truck?

        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 (5) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Afternoon

          • Loudness / Volume 5 5
          • Exhaust Note 5 5
          • Fit & Finish 4.6 4.6
          • Bang For Your Buck 4.6 4.6

          • 5/5

            Installation Time: Less than 1 Hour

            December 06, 2019

            Dual Exhaust

            This product was pretty easy to install myself right in my driveway. Need very few tools to complete the job. I did use a sawsall to cut up my old exhaust which made it easier to get off the truck when laying upside down. The sound is great. Very deep nice tone to it. It did add some HP as well.


            Year: 2016 Submodel: LT Engine: 5.3L V8

            Helpful (0)

          • 5/5

            July 13, 2019

            Sounds great, looks great

            Sounds amazing from a cold start. Acceleration sounds great. Far more aggressive sound. Drone in the cabin isn't terrible. Hopefully you don't live in a very tight neighborhood though.


            Year: 2014 Submodel: LT Engine: 5.3L V8

            Helpful (1)

          • 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 (5)

          • 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 (9)

          • 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 (10)

          Related Silverado 1500 Categories