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

AmericanTrucks no longer carries the Flowmaster American Thunder 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

  • Moderate to Loud Sound Level
  • Better Scavenging and Exhaust Flow for Increased Horsepower and Torque
  • Delta Flow™ Super 40 Series Muffler
  • Has 2.5 in. Mandrel Bent Stainless Steel Tubing
  • Features with 3.0 in. Polished Stainless Steel Exhaust Tips
  • Split Side or Dual Rear Exits
  • Bolt-On Installation
  • Designed for Double and Crew Cab Models
  • Not for Use with 2WD Crew Cab Models with 2-Piece Driveshaft
  • Fits 2014 to 2018 5.3L Chevy Silverado 1500 Models

Review & Installation Video

Review & Install Video

Unique Flowmaster Sound. The Flowmaster American Thunder Cat-Back Exhaust emits a unique and powerful exterior exhaust note but keeps the interior sound level down to within comfortable levels. Indeed, Flowmaster’s patented Delta Flow technology is able to adjust both the interior and exterior sound levels. As a result, you can enjoy a comfortable ride with reduced sound levels inside the cab, while still turning heads with an aggressive exterior growl.

Boosts Overall Performance. Due to the Flowmaster’s Delta Flow technology, your truck is sure to experience improved scavenging. When matched with the system’s mandrel-bent tubing, the result is a much smoother exhaust flow. This then leads to improvements in horsepower, torque, throttle response, and even fuel efficiency.

Premium Stainless Steel Construction. The American Thunder Cat-Back is constructed from premium stainless steel. This allows for both outstanding durability and longevity, as well as minimizing the need for frequent maintenance over time.

Bolt-On Installation. The American Thunder Cat-Back Exhaust makes use of factory mounting holes and can be bolted on easily with basic hand tools. It also comes with the option of having a dual side or dual rear exit configuration. Flowmaster recommends welding all slip-fit connections for a more secure installation.

Application. The Flowmaster American Thunder Cat-Back Exhaust with split side or rear exits is designed to fit 2014 to 2018 5.3L Chevy Silverado 1500 models equipped with Double or Crew Cabs. It’s not compatible with 2WD Crew Cab models with 2-piece driveshaft.

Fitment: 2014 2015 2016 2017 2018 Details

MPN# 817669

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Inlet Pipe
  • (1) 6.5 ft. 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?
  • 4.3L V6 - 14, 15, 16, 17
  • 5.3L V8 - 14, 15, 16, 17, 18

Designed for Double & Crew Cab Models. It is not compatible on 2WD Crew Cab Models with 2-Piece Driveshaft.

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        Customer Reviews (1) Write a Review

        Overall Rating 4

        out of 5 stars

        Installation Time:Less than 1 Hour

        • 4/5

          Installation Time: Less than 1 Hour

          January 10, 2019

          Excellant Selection

          The exhaust came in quickly and I installed it within an hour. The sound is perfect...low end is medium throaty and when you step on the gas it awakens nicely.


          Year: 2016 Submodel: LT Engine: 5.3L V8

          Helpful (6)

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