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Flowmaster American Thunder Dual Exhaust System with Polished Tips; Side/Rear Exit (20-25 6.6L Gas Sierra 3500 HD)Find parts that fit my vehicle

Item SHG8318
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Flowmaster American Thunder Dual Exhaust System with Polished Tips; Side/Rear Exit (20-25 6.6L Gas Sierra 3500 HD)
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Review & Install - Flowmaster American Thunder Dual Exhaust System with Polished Tips; Side/Rear Exit Video   See All Product Videos (1)
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$875.66
245 Reviews
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-10% $875.66 kit Was $972.95

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    $299.00
    Wards Auto Repair LLC
    11 miles away · 25 Reviews ·
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features & Specs

      • Deep Aggressive Performance Tone
      • Improves Exhaust Flow for an Increase in Power
      • 50 Series Performance Mufflers
      • Mandrel-bent 3-inch 409 Stainless Steel Tubing
      • Dual Side or Dual Rear Exit
      • Polished 304 Stainless Steel 4-inch Exhaust Tips
      • Direct Bolt-On Upgrade
      • Fits 2020-2025 6.6L GMC Sierra 3500 HD Crew Cab Models with Standard Box

      Description

      Flowmaster 50 Series Sound. Upgrading to a Flowmaster American Thunder Dual Exhaust System will unleash the beast hiding under the hood of your 3500 GMC Sierra. This American Thunder Cat-Back will convert your Sierra's quiet, tame exhaust note into an aggressive one, with a moderate to aggressive tone inside the cab. Additionally this Kit comes with two sets of tail pipes for either a dual out the back look or dual out behind the rear tires, which is beneficial for towing.

      Power And Performance. Flowmaster American Thunder Dual Exhaust not only improves the sound of your 3500 Sierra, but it will also improve its performance. With the help of its free flowing muffler design and high-flow mandrel bent piping, this Cat-Back will significantly improve exhaust flow for an increase in rear wheel horsepower and torque.

      Stainless Steel Construction. Flowmaster manufactures their Cat-Back Exhaust Systems from 3-inch mandrel bent 16-gauge, 409 stainless steel tubing for it's durability and strength. This Cat-Back features a "50 Series" performance muffler with a pair of 4-inch diameter 304 polished stainless steel tips for impressive styling and sound.

      Direct Bolt-On Installation. Flowmaster engineered their Cat-Back Exhaust to be a direct bolt-on upgrade replacement. This American Thunder Dual Exhaust System will easily bolt straight up to the factory piping without any cutting, modifications or special tools required for an easy straight forward installation.

      Application. This Flowmaster American Thunder Dual Exhaust System with Polished Tips; Side/Rear Exit is designed to fit 2020-2025 GMC Sierra 3500HD trucks with 6.6L gas engine. Crew Cab/6.5ft bed only. Will not fit models with 5th wheel tow hitch installed.

      Fitment:

      Details

      Flowmaster 817933

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • Inlet Pipe Assembly
      • Muffler
      • Right Tailpipe, Front
      • Left Tailpipe, Front
      • Right Tailpipe, Rear
      • Left Tailpipe, Rear
      • (2) Tips
      4.6

      Customer Reviews (245)

      Questions & Answers

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      Will It Fit My Sierra 3500

      • 6.6L V8 - 20, 21, 22, 23, 24, 25

          Word on the Trail

          This was my first experience shopping with American Trucks for accessories for a new truck. I was very pleased with the selection and wad able to find what I was looking for very easily. I was pleased to see the 'Additional items frequently purchased' displayed as well.

          rkiekens
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