2020-2026 Chevrolet Silverado Cat-Back Exhaust Flowmaster Stainless
SKU: 38335605849

2020-2026 Chevrolet Silverado Cat-Back Exhaust Flowmaster Stainless

Sale price$472.48 Regular price$524.98
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

2020-2026 Chevrolet Silverado Cat-Back Exhaust Flowmaster StainlessOverview: This Flowmaster Outlaw Cat back exhaust system for the 2020 2026 Chevy Silverado and GMC Sierra 2500HD 3500HD trucks with the 6. 6L gas engine, is perfect if you are looking for an aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster. Maximum increases of up to 9 hp and 9 lb. ft. over the stock exhaust at the rear wheels. Designed for the Crew Cab, Standard Bed (6.

Overview:

This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2026 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with the 6.6L gas engine, is perfect if you are looking for an aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. Maximum increases of up to 9 hp and 9 lb.ft. over the stock exhaust at the rear wheels. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel Outlaw series muffler and large dual 3.00-inch 409 stainless steel mandrel-bent tailpipes that can be configured to exit either dual straight out the back, or dual out the sides behind the rear wheels which is best suited for towing applications. The system is finished off with polished 4.00-inch stainless steel tips and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

Features:

  • Crossmember-Back Design Works with Stock Manifolds or Headers, Allowing More Application Options
  • 16-Gauge, 2.50-Inch 409 Stainless Steel Pipes add Durability and Strength
  • Super 44 Mufflers Deliver Increased Performance and an Aggressive to Moderate Sound Level
  • Three Different Tailpipe Exit Options Allow You to Tailor the Look of the Kit to Your Style
  • Mandrel-Bent Pipes Help to Maximize the Exhaust Flow for Better Performance
  • H-Pipe Style Crossover Helps Exhaust Gas Scavenging and Reduces Drone
  • Includes Hangers and Hardware for Installation
  • Lifetime Limited Warranty
  • 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: Outlaw
  • 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
  • Inlet Diameter: 3.5
  • Inlet Type: Flanged
  • Main Piping Diameter: 3
  • Mount Type: Uses Factory Hangers
  • Mounting Bracket Included: Yes
  • Muffler Body Height: 4
  • Muffler Body Length: 6.5
  • Muffler Body Material: 409 Stainless Steel
  • Muffler Body Shape: Oval
  • Muffler Body Width: 9.5
  • Muffler Color: Black
  • Muffler Finish: Black High-Temperature Paint Finish
  • Muffler Flanged Inlet: No
  • Muffler Flanged Outlet: No
  • Muffler Included: Yes
  • Muffler Inlet Connection: Slip-Fit
  • Muffler Inlet Inside Diameter: 3.5
  • Muffler Inlet Location: Center
  • Muffler Inlet Outside Diameter: 3.63
  • Muffler Outlet Connection: Slip-Fit
  • Muffler Outlet Diameter: 3
  • Muffler Outlet Location: Dual
  • Muffler Outlet Quantity: 2
  • Muffler Overall Length: 12.375
  • Muffler Part Number: Kit Only
  • Muffler Quantity: 1
  • Muffler Series: 10 Series
  • Muffler Type: Chambered
  • Pipe Color: Silver
  • Pipe Material: 409 Stainless Steel
  • Sound Level: Aggressive
  • Spring Bolt Kit Included: No
  • Tail Pipe Outlet Outside Diameter: 3
  • Tail Pipe Quantity: 2
  • Tail Pipe Tapered Outlet: No
  • Tip Logo: Embossed
  • Type: Cat-Back
  • Valve Included: No
  • Valve Type: Not Applicable
  • Part Number: 818112
  • Applications:

    • 2020-2026 Chevrolet Silverado 2500 HD 401 CID
    • 2020-2026 Chevrolet Silverado 3500 HD 401 CID
    • 2020-2026 GMC Sierra 2500 HD 401 CID
    • 2020-2026 GMC Sierra 3500 HD 401 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: 38335605849

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    4.3 ★★★★★
    Based on 1788 reviews
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    Heidi Godines
    Pawtucket, US
    ★★★★★ 5
    Great floating display shelf
    Color: Brown, Size: 55.1"W x 10.3"D x 1.8"H, Set of 1
    Perfect display shelf for trinkets or memorabilia. Placed this over our wall mounted TV for our football collection. Looks great and was easy to mount. The size is perfect. Great value for the money.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 15, 2026
    A
    Verified Purchase
    ariel brammer
    Carnegie, US
    ★★★★★ 5
    Cute but one is broken
    Color: Brown, Size: 35.7"W x 10.3"D x 1.8"H, Set of 2, Color: Brown, Size: 35.7"W x 10.3"D x 1.8"H, Set of 2
    Update: they sent me new ones and they seem to be holding up, thank you! I really wanted to love these but one of them came bent so I can’t use it because I’m worried it’s going to ruin the wall. It’s slanted so far down but the one that didn’t come bent works great and looks really cute
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 7, 2026
    R
    Verified Purchase
    R
    Draper, US
    ★★★★★ 5
    A birthday gift that made someone happy.
    This was bought as a birthday gift, good quality, very sturdy, and the recipient loved it highly recommend this product.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 25, 2026
    S
    Verified Purchase
    S.landia_Librarian
    Omaha, US
    ★★★★★ 1
    Issues with mounting the shelves, big time
    Color: Brown, Size: 55.1"W x 10.3"D x 1.8"H, Set of 2
    I bought the 55 inches floating shelves. I have an area above my linen cabinet that I wanted to utilize for storage and books in my hall. I did my measuring, figured out spacing. Marked everything off to do 3 total shelves (bought two boxes). A couple of spots screwed into a stud, and the others I had to install the plastic mount things. I had used those before so I just did the predrill then tapped them in, finished off by screwing the mount flush with the wall. I grabbed the first bracket and decide to start with a screw that had one of the inset mount things (sorry the correct term is escaping me). It never once occurred to me to check that the plastic mount and screw would not work. We’ll surprise! I tried and tried to get the screw to screw thru the mount, the mount is the rigid plastic thoe that is supposed to split when the screw goes through. Well something wasn’t engineered properly on the mounts cuz they would not thread a screw. They would not split. I even went into my garage and tried different screws I had to see if maybe it was just too big…or something. Then I started just prying it apart and could not get it to split like it’s supposed to, the tip piece broke off before the piece split. I have never had this situation before. I now have a bunch of these, that leave huge holes in my wall, where I measured out for a shelf to go. I’m not a huge DIYer so now I’m trying to figure out if I can salvage this situation but I’m afraid that if I get different mounts they will be too small for the already created holes, or they will fit the hole but because it’s screwing into dry wall, the drywall already has threads from the other mount, will it strip if the threads aren’t 100% the same. Oooooor am I going to have to patch up and paint that wall, then buy new mounts and attempt to try again….which I will now have to set the shelves at a different height so I don’t screw into the same holes I patched since I don’t trust them…..ugh. I practically want to cry. lol. So if I could give this negative stars I would! I feel stupid due to these having such great reviews by others. Comments of how easy they were to install. I will also mention that a few others mentioned the metal bracket that is mounted to the wall then the shelf slide onto is very flimsy. I could bend it side to side with my hands. The only reason I decided it would be ok is that there are a total of 8 screws in the mount, figured it would be stable enough.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on September 14, 2025
    R
    Verified Purchase
    Rhonda Emmons
    Grantham, US
    ★★★★★ 5
    Was so easy to put up.
    Love it
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 27, 2026

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