SKU: 84820302506

2011-2018 Chevrolet Silverado Cat-Back Exhaust Flowmaster Stainless

Sale price$527.38 Regular price$585.98
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Ships within 48 hours · Estimated delivery Sep 10 - Sep 15

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Description

2011-2018 Chevrolet Silverado Cat-Back Exhaust Flowmaster StainlessOverview: The American Thunder Cat back exhaust system for 2011 2018 Chevrolet Silverado and GMC Sierra 1500 trucks with the 6. 2L engine, is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior tone. This bolt on stainless steel system features a 3. 50 inch mandrel bent inlet pipe flowing into the 50 Series HD performance muffler with large 4. 00 inch internals and a built in tuned resonance

Overview:

The American Thunder® Cat-back exhaust system for 2011-2018 Chevrolet Silverado and GMC Sierra 1500 trucks with the 6.2L engine, is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior tone. This bolt-on stainless steel system features a 3.50-inch mandrel-bent inlet pipe flowing into the 50 Series™ HD performance muffler with large 4.00-inch internals and a built-in tuned resonance chamber to minimize interior drone. The system has dual 2.50-inch mandrel-bent tailpipes which use the factory hanger locations and are finished off with large 3.50-inch polished stainless steel tips. This exhaust system gives you choices for tailpipe exit location either out each side behind the rear tires if you do a lot of towing, or straight-out under the rear bumper for a muscular look. The exhaust system is covered by our Lifetime Limited Warranty and includes all necessary parts and hardware for easy installation you can do at home. Note: Fits 2/4 WD model with Crew Cab/Short Bed (143.5" WB), Crew Cab/Standard Bed (153" WB) and Double Cab/Standard Bed (143.5" WB).

Features:

  • • Brushed 304 stainless steel offers maximum corrosion resistance for a cleaner and more high-end appearance.
  • • TIG welding offers a more precise weld, better heat control and high-end appearance compared to MIG welding.
  • • Black chrome tips offer a stylish upscale look.
  • • Signature Series muffler offers an aggressive to moderate performance tone and increased performance over the stock system.
  • • Installer friendly design allows for an at home installation.
  • • Dyno proven performance gains you can feel.
  • • Increased power and torque over the stock exhaust system.
  • • Brushed appearance removes tooling marks for a cleaner overall look.
  • Specs:

  • Brand: Flowmaster
  • CARB (California) Compliant: Yes
  • Catalytic Converter Included: No
  • Catalytic Converter Quantity: 0
  • Clamping Type: Flat Band
  • Clamps Included: Yes
  • Emission Code: 5
  • Exhaust Series: American Thunder
  • Exhaust Tip Color: Silver
  • Exhaust Tip Connection: Clamp-On
  • Exhaust Tip Cut: Angled
  • Exhaust Tip Edge: Angle Cut
  • Exhaust Tip Finish: Polished
  • Exhaust Tip Material: 304 Stainless Steel
  • Exhaust Tip Quantity: 2
  • Exhaust Tip Shape: Round
  • Exhaust Tip Wall: Double Wall
  • Exit Style: Dual Out Side
  • Finish: Natural
  • Gasket Or Seal Included: No
  • Grade Type: Performance
  • Hangers Included: Yes
  • Heat Shield Included: No
  • Inlet Type: Clamp-On
  • Main Piping Diameter: 2.5
  • Mount Type: Uses Factory Hangers
  • Mounting Bracket Included: Yes
  • Muffler Body Height: 5
  • Muffler Body Length: 18
  • Muffler Body Material: 409 Stainless Steel
  • Muffler Body Shape: Oval
  • Muffler Body Width: 10
  • Muffler Finish: Natural
  • Muffler Flanged Inlet: No
  • Muffler Flanged Outlet: No
  • Muffler Included: Yes
  • Muffler Inlet Connection: Slip-Fit
  • Muffler Inlet Inside Diameter: 3.5
  • Muffler Inlet Outside Diameter: 3.13
  • Muffler Outlet Connection: Slip-Fit
  • Muffler Outlet Diameter: 2.5
  • Muffler Outlet Quantity: 2
  • Muffler Part Number: Kit Only
  • Muffler Quantity: 1
  • Muffler Series: 50 Series HD
  • Muffler Type: Chambered
  • Pipe Color: Silver
  • Pipe Material: 409 Stainless Steel
  • Sound Level: Aggressive / Moderate
  • Spring Bolt Kit Included: No
  • Tail Pipe Outlet Outside Diameter: 2.5
  • Tail Pipe Quantity: 2
  • Tail Pipe Tapered Outlet: No
  • Tip Logo: Embossed
  • Type: Cat-Back
  • Valve Included: No
  • Valve Type: Not Applicable
  • Part Number: 817602
  • Applications:

    • 2011-2018 Chevrolet Silverado 1500 376 CID
    • 2011-2018 GMC Sierra 1500 376 CID

    Emissions:

    • This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 84820302506

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    4.4 ★★★★★
    Based on 14 reviews
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    L
    Verified Purchase
    la
    Lowell, US
    ★★★★★ 5
    Good fit and nice sharp holesaw included
    The hole made by the included holesaw was the perfect size for the insert. They work well and cosmetically look much better than a raw hole in the wood. I tried the cable wrap and inserter and both make the job of wrapping and securing the cables much easier. Overall a good product and a good value.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 17, 2025
    G
    Verified Purchase
    Grant
    Whiting, US
    ★★★★★ 5
    Great for small projects. Nice fit.
    I purchased this set while building a couple of end tables. They fit like a glove and it's really nice that they come with the hole saw bit. It's a great set for what you get.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 19, 2026
    S
    Verified Purchase
    Sia G
    Waukegan, US
    ★★★★★ 5
    My desk looks organized
    Works great
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 18, 2026
    N
    Verified Purchase
    NegativeG
    Lexington, US
    ★★★★★ 5
    Includes everything you need and a bonus to get the cord wrap
    I bought this to route the cords up to the monitor on a height-adjustable desk. The top of the desk is an inch thick, and this was easy to drill through. To make sure I got a clean cut and did not damage the top, I put painters' tape on the area where I wanted to cut and drilled a small starter hole to get it exactly in the right spot. It cut a really clean hole from the top, and the plastic insert fit perfectly. Once I got the hole cut and the wires run where I wanted them, I put the cord wrap on. The tool that comes with the cord wrap is really slick and super easy to use. I was able to bundle together three cords that hang off the side of the desk. Given that the desk is adjustable, it was a nice bonus to get the cord manager with the kit, as it keeps the cords from getting hung up in the desk when adjusting it. I'm very happy with the purchase, great price.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on December 14, 2025
    D
    Verified Purchase
    Dean Thompson
    Dallas, US
    ★★★★★ 4
    Good product
    The hole covers are great. As far as the hole cutting bit. Not so much. But still worth the price.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 26, 2025

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