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    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817541
    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817541
    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817541
    • American Thunder Cat-Back Exhaust System Fits 2011-2019 Silverado/Sierra 2500Hd/3500Hd With 6.0L Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System Fits 2011-2019 Silverado/Sierra 2500Hd/3500Hd With 6.0L Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System Fits 2011-2019 Silverado/Sierra 2500Hd/3500Hd With 6.0L Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System Fits 2011-2019 Silverado/Sierra 2500Hd/3500Hd With 6.0L Engine Aggressive To Moderate Sound Flowmaster
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    Sale!

    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817541

    Vendor: Flowmaster
    Part Number: 817541
    Save $169
    Sale Price $1,349.95 Regular Price $1,518.95

    In Stock

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    The new Flowmaster American Thunder® Cat-back exhaust system for 2011-2019 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with 6.0L, is perfect for the person looking for a moderate to aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel 50 Series HD™ muffler and large dual 3.00-inch stainless steel mandrel bent tailpipes that can be configured to exit either dual out the sides, or dual straight out the back. The system is finished off with beautifully 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. Notes: Fits Crew Cab with 6.5' bed length. 153.7" wheelbase only.


    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817541


    Specifications:

    Brand Flowmaster
    California Proposition 65 Yes
    California Proposition 65 Chemical Name Nickel (Metallic)
    California Proposition 65 Chemical Name Chromium (hexavalent compounds)
    CARB (California) Compliant Yes
    Catalytic Converter Included No
    2874 0
    Category Exhaust
    3728 Flat Band
    1882 Yes
    Emission Code 5
    Exhaust Series American Thunder
    11205 Silver
    9874 Clamp-On
    9876 Angled
    1162 4.00
    9877 Angle Cut
    1163 Polished
    9881 No
    10104 13.00
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Double Wall
    9870 Dual Out Side
    9870 Dual Out Rear
    200 Natural
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 3.50
    596 Flanged
    9871 4.00
    92 Yes
    9884 5.00
    1892 18.25
    4372 409 Stainless Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 No
    4368 No
    Muffler Included Yes
    9962 Slip-Fit
    4365 3.50
    4366 3.63
    9963 Slip-Fit
    4375 2
    Muffler Part Number Kit Only
    4374 1
    Muffler Series 50 Series HD
    1174 Chambered
    part type Exhaust System
    3530 409 Stainless Steel
    Product Type Exhaust System
    Sound Level Aggressive / Moderate
    4377 No
    Sub Category Exhaust and Tail Pipes
    4369 3.00
    4376 2
    Tail Pipe Quantity Dual
    4370 No
    26 Cat-Back
    6014 No
    2126 Not Applicable
    Warning California Proposition 65
    Pipe Color Silver
    Drive 4WD
    Drive 2WD
    9885 10.00
    Brand Flowmaster
    California Proposition 65 Yes
    California Proposition 65 Chemical Name Nickel (Metallic)
    California Proposition 65 Chemical Name Chromium (hexavalent compounds)
    CARB (California) Compliant Yes
    Catalytic Converter Included No
    2874 0
    Category Exhaust
    3728 Flat Band
    1882 Yes
    Emission Code 5
    Exhaust Series American Thunder
    11205 Silver
    9874 Clamp-On
    9876 Angled
    1162 4.00
    9877 Angle Cut
    1163 Polished
    9881 No
    10104 13.00
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Double Wall
    9870 Dual Out Side
    9870 Dual Out Rear
    200 Natural
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 3.50
    596 Flanged
    9871 4.00
    92 Yes
    9884 5.00
    1892 18.25
    4372 409 Stainless Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 No
    4368 No
    Muffler Included Yes
    9962 Slip-Fit
    4365 3.50
    4366 3.63
    9963 Slip-Fit
    4375 2
    Muffler Part Number Kit Only
    4374 1
    Muffler Series 50 Series HD
    1174 Chambered
    part type Exhaust System
    3530 409 Stainless Steel
    Product Type Exhaust System
    Sound Level Aggressive / Moderate
    4377 No
    Sub Category Exhaust and Tail Pipes
    4369 3.00
    4376 2
    Tail Pipe Quantity Dual
    4370 No
    26 Cat-Back
    6014 No
    2126 Not Applicable
    Warning California Proposition 65
    Pipe Color Silver
    Drive 4WD
    Drive 2WD
    9885 10.00
    Description_ABR SYS 11-19 GM
    Description_SHO SYS 11-19 GM 2500HD
    Description_INV 11-19 GM 2500HD 6.0L CC/SB AMT DOR/S
    Description_ASC Fits 2011-2019 Chevrolet Silverado and GMC Sierra 2500HD/3500HD Crew cab/standard 6.5-foot bed models with 6.0L gas engine. 153.7" wheelbase.
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Description_EXT Fits 2011-2019 Chevrolet Silverado, GMC Sierra 2500HD/3500HD with 6.0L engine - Aggressive to moderate sound
    Description_MKT The new Flowmaster American Thunder® Cat-back exhaust system for 2011-2019 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with 6.0L, is perfect for the person looking for a moderate to aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel 50 Series HD™ muffler and large dual 3.00-inch stainless steel mandrel bent tailpipes that can be configured to exit either dual out the sides, or dual straight out the back. The system is finished off with beautifully 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. Notes: Fits Crew Cab with 6.5' bed length. 153.7" wheelbase only.
    Description_FAB Uses the Factory Hanger Locations for Easy Installation
    Description_FAB 50 Series HD Muffler with Delta Flow Technology
    Description_FAB Multiple Tailpipe Exits Provided in Kit
    Description_FAB Large 3.00-inch Dual Tailpipes
    Description_FAB Stainless Steel Construction
    Description_FAB Lifetime Limited Warranty
    Description_FAB Flowmaster Quality
    Description_ABR SYS 11-19 GM
    Description_SHO SYS 11-19 GM 2500HD
    Description_INV 11-19 GM 2500HD 6.0L CC/SB AMT DOR/S
    Description_ASC Fits 2011-2019 Chevrolet Silverado and GMC Sierra 2500HD/3500HD Crew cab/standard 6.5-foot bed models with 6.0L gas engine. 153.7" wheelbase.
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Description_EXT Fits 2011-2019 Chevrolet Silverado, GMC Sierra 2500HD/3500HD with 6.0L engine - Aggressive to moderate sound
    Description_MKT The new Flowmaster American Thunder® Cat-back exhaust system for 2011-2019 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with 6.0L, is perfect for the person looking for a moderate to aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel 50 Series HD™ muffler and large dual 3.00-inch stainless steel mandrel bent tailpipes that can be configured to exit either dual out the sides, or dual straight out the back. The system is finished off with beautifully 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. Notes: Fits Crew Cab with 6.5' bed length. 153.7" wheelbase only.
    Description_FAB Uses the Factory Hanger Locations for Easy Installation
    Description_FAB 50 Series HD Muffler with Delta Flow Technology
    Description_FAB Multiple Tailpipe Exits Provided in Kit
    Description_FAB Large 3.00-inch Dual Tailpipes
    Description_FAB Stainless Steel Construction
    Description_FAB Lifetime Limited Warranty
    Description_FAB Flowmaster Quality


    This Part Fits:

    Year Make Model Submodel Notes
    2015 Chevrolet Silverado 2500 HD High Country
    2016 Chevrolet Silverado 2500 HD High Country
    2017 Chevrolet Silverado 2500 HD High Country
    2018 Chevrolet Silverado 2500 HD High Country
    2019 Chevrolet Silverado 2500 HD High Country
    2011 Chevrolet Silverado 2500 HD LT
    2012 Chevrolet Silverado 2500 HD LT
    2013 Chevrolet Silverado 2500 HD LT
    2014 Chevrolet Silverado 2500 HD LT
    2015 Chevrolet Silverado 2500 HD LT
    2016 Chevrolet Silverado 2500 HD LT
    2017 Chevrolet Silverado 2500 HD LT
    2018 Chevrolet Silverado 2500 HD LT
    2019 Chevrolet Silverado 2500 HD LT
    2011 Chevrolet Silverado 2500 HD LTZ
    2012 Chevrolet Silverado 2500 HD LTZ
    2013 Chevrolet Silverado 2500 HD LTZ
    2014 Chevrolet Silverado 2500 HD LTZ
    2015 Chevrolet Silverado 2500 HD LTZ
    2016 Chevrolet Silverado 2500 HD LTZ
    2017 Chevrolet Silverado 2500 HD LTZ
    2018 Chevrolet Silverado 2500 HD LTZ
    2019 Chevrolet Silverado 2500 HD LTZ
    2011 Chevrolet Silverado 2500 HD WT
    2012 Chevrolet Silverado 2500 HD WT
    2013 Chevrolet Silverado 2500 HD WT
    2014 Chevrolet Silverado 2500 HD WT
    2015 Chevrolet Silverado 2500 HD WT
    2016 Chevrolet Silverado 2500 HD WT
    2017 Chevrolet Silverado 2500 HD WT
    2018 Chevrolet Silverado 2500 HD WT
    2019 Chevrolet Silverado 2500 HD WT
    2016 Chevrolet Silverado 3500 HD High Country
    2017 Chevrolet Silverado 3500 HD High Country
    2018 Chevrolet Silverado 3500 HD High Country
    2019 Chevrolet Silverado 3500 HD High Country
    2016 Chevrolet Silverado 3500 HD LT
    2017 Chevrolet Silverado 3500 HD LT
    2018 Chevrolet Silverado 3500 HD LT
    2019 Chevrolet Silverado 3500 HD LT
    2016 Chevrolet Silverado 3500 HD LTZ
    2017 Chevrolet Silverado 3500 HD LTZ
    2018 Chevrolet Silverado 3500 HD LTZ
    2019 Chevrolet Silverado 3500 HD LTZ
    2016 Chevrolet Silverado 3500 HD WT
    2017 Chevrolet Silverado 3500 HD WT
    2018 Chevrolet Silverado 3500 HD WT
    2019 Chevrolet Silverado 3500 HD WT
    2015 GMC Sierra 2500 HD Base
    2016 GMC Sierra 2500 HD Base
    2017 GMC Sierra 2500 HD Base
    2018 GMC Sierra 2500 HD Base
    2019 GMC Sierra 2500 HD Base
    2011 GMC Sierra 2500 HD Denali
    2012 GMC Sierra 2500 HD Denali
    2013 GMC Sierra 2500 HD Denali
    2014 GMC Sierra 2500 HD Denali
    2015 GMC Sierra 2500 HD Denali
    2016 GMC Sierra 2500 HD Denali
    2017 GMC Sierra 2500 HD Denali
    2018 GMC Sierra 2500 HD Denali
    2019 GMC Sierra 2500 HD Denali
    2011 GMC Sierra 2500 HD SLE
    2012 GMC Sierra 2500 HD SLE
    2013 GMC Sierra 2500 HD SLE
    2014 GMC Sierra 2500 HD SLE
    2015 GMC Sierra 2500 HD SLE
    2016 GMC Sierra 2500 HD SLE
    2017 GMC Sierra 2500 HD SLE
    2018 GMC Sierra 2500 HD SLE
    2019 GMC Sierra 2500 HD SLE
    2011 GMC Sierra 2500 HD SLT
    2012 GMC Sierra 2500 HD SLT
    2013 GMC Sierra 2500 HD SLT
    2014 GMC Sierra 2500 HD SLT
    2015 GMC Sierra 2500 HD SLT
    2016 GMC Sierra 2500 HD SLT
    2017 GMC Sierra 2500 HD SLT
    2018 GMC Sierra 2500 HD SLT
    2019 GMC Sierra 2500 HD SLT
    2011 GMC Sierra 2500 HD WT
    2012 GMC Sierra 2500 HD WT
    2013 GMC Sierra 2500 HD WT
    2014 GMC Sierra 2500 HD WT
    2015 GMC Sierra 3500 HD Base
    2016 GMC Sierra 3500 HD Base
    2017 GMC Sierra 3500 HD Base
    2018 GMC Sierra 3500 HD Base
    2011 GMC Sierra 3500 HD Denali
    2012 GMC Sierra 3500 HD Denali
    2013 GMC Sierra 3500 HD Denali
    2014 GMC Sierra 3500 HD Denali
    2015 GMC Sierra 3500 HD Denali
    2016 GMC Sierra 3500 HD Denali
    2017 GMC Sierra 3500 HD Denali
    2018 GMC Sierra 3500 HD Denali
    2019 GMC Sierra 3500 HD Denali
    2011 GMC Sierra 3500 HD SLE
    2012 GMC Sierra 3500 HD SLE
    2013 GMC Sierra 3500 HD SLE
    2014 GMC Sierra 3500 HD SLE
    2015 GMC Sierra 3500 HD SLE
    2016 GMC Sierra 3500 HD SLE
    2017 GMC Sierra 3500 HD SLE
    2018 GMC Sierra 3500 HD SLE
    2019 GMC Sierra 3500 HD SLE
    2011 GMC Sierra 3500 HD SLT
    2012 GMC Sierra 3500 HD SLT
    2013 GMC Sierra 3500 HD SLT
    2014 GMC Sierra 3500 HD SLT
    2015 GMC Sierra 3500 HD SLT
    2016 GMC Sierra 3500 HD SLT
    2017 GMC Sierra 3500 HD SLT
    2018 GMC Sierra 3500 HD SLT
    2019 GMC Sierra 3500 HD SLT
    2011 GMC Sierra 3500 HD WT
    2012 GMC Sierra 3500 HD WT
    2013 GMC Sierra 3500 HD WT
    2014 GMC Sierra 3500 HD WT
    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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