SKU: 7435164432

2020-2026 Chevrolet Silverado Performance Muffler Flowmaster Stainless

$191.67 $212.97
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

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Description

2020-2026 Chevrolet Silverado Performance Muffler Flowmaster StainlessOverview: Flowmaster's Flow FX Direct Fit Muffler exhaust system for the 2020 2026 GM 2500HD and 3500HD trucks with the 6. 6L gas engines gives you a great value packed way to help you customize your GM truck to your personality. This performance muffler system fits both 2 4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble free service and performance. Features include a 3. 50 inch inlet pipe leading into a 409

Overview:

Flowmaster's® Flow FX Direct-Fit Muffler exhaust system for the 2020-2026 GM 2500HD and 3500HD trucks with the 6.6L gas engines gives you a great value packed way to help you customize your GM truck to your personality. This performance muffler system fits both 2/4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble-free service and performance. Features include a 3.50-inch inlet pipe leading into a 409 stainless steel Flow FX series "straight-through" muffler for great sound and maximum performance and no drone. The muffler then connects to the factory tailpipe for a simple and effective performance upgrade. Max dyno gains of 7 hp and 5 lb-ft at the rear wheels. This results in better acceleration and towing performance. The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Kits include installation instructions and all necessary hardware. Backed by Flowmaster's Lifetime Limited Warranty.

Features:

  • 3.5-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • A tuned Flow FX style muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
  • Max increases of up to 12 hp and 11 lb-ft over the stock exhaust at the wheels
  • Tuned performance muffler eliminates interior drone
  • Maintains factory warranty
  • Lifetime Limited Warranty

    • Specs:

  • Body Diameter: 5
  • Body Height: 5
  • Body Length: 18
  • Body Material: 409 Stainless Steel
  • Body Width: 8
  • Brand: Flowmaster
  • Catalytic Converter Included: No
  • Clamping Type: Flat Band
  • Clamps Included: Yes
  • Color: Natural
  • Emission Code: 5
  • Exhaust Series: Flow FX
  • Exhaust Tip Quantity: 0
  • Exit Position: OEM
  • Exit Position: OEM
  • Finish: Natural
  • Gasket Or Seal Included: No
  • Grade Type: Performance
  • Heat Shield: No
  • Heat Shield Attached: No
  • Inlet Diameter: 3.5
  • Inlet Inside Diameter: 3.52
  • Inlet Location: Center
  • Inlet Outside Diameter: 3.11
  • Inlet Quantity: 1
  • Inlet Type: Slip-Fit
  • Main Piping Diameter: Center
  • Material: 409 Stainless Steel
  • Mount Type: Uses Factory Hangers
  • Muffler Body Length: 10
  • Muffler Body Material: 409 Stainless Steel
  • Muffler Body Shape: Round
  • Muffler Body Width: 8
  • Muffler Color: Natural
  • Muffler Finish: Natural
  • Muffler Inlet Location: Center
  • Muffler Material: 409 Stainless Steel
  • Muffler Outlet Location: Center
  • Muffler Part Number: Kit Only
  • Muffler Quantity: 1
  • Muffler Series: Flow FX
  • Muffler Shape: Oval
  • Muffler Type: Absorption
  • Outlet Diameter: 3.5
  • Outlet Inside Diameter: 3.52
  • Outlet Location: Center
  • Outlet Outside Diameter: 3.65
  • Outlet Quantity: 1
  • Outlet Type: Slip-Fit
  • Overall Length: 34.25
  • Pipe Material: 409 Stainless Steel
  • Shape: Oval
  • Single Dual: Single
  • Sound Level: Aggressive / Moderate
  • System Type: Direct-fit Muffler
  • Tubing Diameter: 3.5
  • Type: Direct-fit Muffler
  • Valve Actuator Included: No
  • Valve Included: No
  • Valve Type: Not Applicable
  • Part Number: 718155

    • 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: 7435164432

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    4.0 ★★★★★
    Based on 1959 reviews
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    Skurtzo
    Grantham, US
    ★★★★★ 4
    A little snug on the thighs
    Size: Medium, Color: Multicoloured G (5-pack)
    Super comfy, soft and thin. For reference, I'm 5'6", 135, athletic build. I bought medium. I almost returned them because I thought they were a bit too snug on my thighs, and my thighs are not large at all. I was concerned about panty lines under snug clothing. But, because they're thin, I figured they would probably stretch, so I kept them. So far, I've only worn them under a night shirt, but they're super comfortable and they dont ride up at all. Very nice, but if your thighs are a little thick, you probably won't like them.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on August 29, 2025
    S
    Verified Purchase
    Shanna
    Port Orchard, US
    ★★★★★ 5
    Functional + Sexy
    Size: Small, Color: Multicoloured E-(5-pack), Size: Small, Color: Multicoloured E-(5-pack)
    Not only do these feel good, my husband can’t keep his hands off me. They fit so good and are soft. I change into these to sleep but also just use them as shorts to wear around the house. They’re comfortable and don’t slide around. I got a size small and I’m 100lbs.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 13, 2026
    C
    Verified Purchase
    ClairY
    New York, US
    ★★★★★ 5
    Finally!
    Size: X-Large, Color: All Black D (5-pack)
    Finally, comfortable underwear that don’t end up giving me a wedgie. I have a round booty and most cuts of underwear end up shifting as I walk and sit. The hem of the underwear comes right under my cheeks and the lightweight material ensures there’s no panty line and no shifting to where I don’t want them! I’m definitely purchasing more.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 17, 2026
    A
    Verified Purchase
    Amazon Customer
    Draper, US
    ★★★★★ 3
    Ehh
    Size: Medium, Color: Multicoloured E-(5-pack)
    Very thin, still comfy but very thin material. Super soft though. I've worn and washed and they have held up but I won't be repurchasing bc these are so thin
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 14, 2026
    G
    Verified Purchase
    Grma4m&m
    Boise, US
    ★★★★★ 5
    They’re fantastic!!!!
    Size: X-Large, Color: Multicoloured E-(5-pack)
    My clothing size is 16/18 and XL. Even though Amazon suggested a size XXL, I ordered my normal XL and they fit perfectly. The fabric for this style is 92% bamboo viscose and is amazingly soft and almost silky feeling. I had ordered a different boy short in this brand but they were 80% bamboo viscose and the fabric was significantly heavier. I returned those and ordered these.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 25, 2026

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