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Flowmaster American Thunder Stainless Steel Dual Exhaust System - Side/Rear Exit (11-18 6.2L Silverado 1500)

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Features & Details

  • 50 Series High-Performance Muffler
  • 2.5" Mandrel Bent Tubing
  • Strong Stainless Steel Construction
  • Logo Embossed 3.5" Stainless Tips
  • Bolt On Design; Some Cutting May Be Required
  • Fits 2011-2018 6.2L Chevrolet Silverado (Crew and Double Cabs Only)
Steady Flow Design. With a high-performance muffler, this exhaust uses patented Delta Flow technology. It’s dyno-tuned to ensure it works efficiently. The tubing is also mandrel bent for smooth, seamless flow, preventing leaks and blockages in the exhaust system.

Durable Make. This exhaust system is made out of 409S stainless steel to remain secure while running high-performance applications. Strong and sturdy, the stainless steel construction even extends to the stainless tips that are logo embossed. The tips are located on the side and rear exits of this split exhaust design.

Bolt On Installation. Flowmaster engineered their American Thunder Cat-Back to be a direct upgrade replacement of the factory Silverado exhaust system. All of the necessary hardware is included and installs easily with basic hand tools. Depending on your cab and box configuration, some cutting to the exhaust piping may be required.

Application. The Flowmaster American Thunder Stainless Steel Split Rear/Side Exit Cat-Back Exhaust is designed to be used on the 2011-2018 Chevrolet Silverado's with the following cab and box configurations.
  • Extended Cab with the Standard Box
  • Extended Cab with the Short Box
  • Double Cab with the Standard Box
  • Crew Cab with the Short Box
  • Crew Cab with the Standard Box

Fitment: 2011 2012 2013 2014 2015 2016 2017 2018 Details

MPN# 817602

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Inlet Pipe
  • (1) Muffler
  • (2) Over Axle Pipes
  • (2) Tips
Installation Info
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Customer Reviews (1) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Afternoon

  • Loudness / Volume 3 3
  • Exhaust Note 5 5
  • Fit & Finish 5 5
  • Bang For Your Buck 4 4

  • 5/5

    Installation Time: Afternoon

    December 13, 2018

    Review from Flowmaster American Thunder Stainless Steel Dual Exhaust System - Side/Rear Exit (11-18 6.2L Sierra 1500)

    Flowmaster Dual Install

    This is a great item. Install was fairly easy. The hardest part was removing the stock exhaust in one piece and yes it can be done. To remove stock exhaust I had to loosen the passenger rear shock and the exhaust came out. Installing this was a breeze! After installing this I'd recommend taking it to a shop to tack weld. It sounds amazing and looks amazing! I absolutely love it and would buy it again. No drone noise on the highway and it purrs beautifully!


    Year: 2018 Submodel: SLT Engine: 6.2L V8

    Helpful (7)