Skip to Product Info
    • American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 4.3L, 4.8L, 5.3L Engine, Standard Cab/Short Bed. Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 4.3L, 4.8L, 5.3L Engine, Standard Cab/Short Bed. Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 4.3L, 4.8L, 5.3L Engine, Standard Cab/Short Bed. Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 4.3L, 4.8L, 5.3L Engine, Standard Cab/Short Bed. Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 4.3L, 4.8L, 5.3L Engine, Standard Cab/Short Bed. Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2007* (*Classic Body Only) Chevrolet Silverado/Gmc Sierra 1500 4.3L, 4.8L, 5.3L Engine, Standard Cab/Short Bed. Stainless Steel Aggressive To Moderate Sound Flowmaster
    • 817435_319252.jpg
    • 817435_119252.jpg
    • 817435_219252.jpg
    • 817435_419252.jpg
    • 817435_pk19252.jpg
    • aggressivemoderatesoundlevel.jpg
    • 817435_319252.jpg
    • 817435_119252.jpg
    • 817435_219252.jpg
    • 817435_419252.jpg
    • 817435_pk19252.jpg
    • aggressivemoderatesoundlevel.jpg

    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817435

    Vendor: Flowmaster
    Part Number: 817435
    Save $157
    Sale Price $1,249.95 Regular Price $1,406.95

    Currently out of 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.
    Payment & Security

    Secure, encrypted checkout. Card details go straight to the payment processor and are never stored by us.

    • Amazon
    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa
    Share to:
    For the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder® system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 50™ Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of 3.00-inch diameter highly polished 304 stainless steel tips embossed with the Flowmaster® name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Notes: Fits 2/4 wheel drive standard cab/short bed models only. *Fits 2007 Classic body only. For Standard Cab/Short Bed models only.


    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817435


    Specifications:

    Description_ABR SYS 99-06 GM
    Description_SHO SYS 99-06 GM 1500 SC
    Description_INV 99-06 GM 1500 SC/SB V8 AMT 409S
    Description_ASC Fits 1999-2007* (*2007 Classic body only) Chevrolet Silverado/GMC Sierra 1500 with 4.3L, 4.8L, 5.3L engine. Fits 2/4 wheel drive standard cab/short bed models only.
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Description_EXT 1999-2007* (*Classic body Only) Chevrolet Silverado/GMC Sierra 1500 4.3L, 4.8L, 5.3L engine, Standard Cab/Short Bed. Stainless Steel - Aggressive to moderate sound
    Description_MKT For the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder® system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 50™ Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of 3.00-inch diameter highly polished 304 stainless steel tips embossed with the Flowmaster® name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Notes: Fits 2/4 wheel drive standard cab/short bed models only. *Fits 2007 Classic body only. For Standard Cab/Short Bed models only.
    Description_FAB Includes Hangers and Hardware for an Easy Installation
    Description_FAB 3.00-inch Polished 304 Stainless Steel Embossed Tips
    Description_FAB Mandrel-bent 16-gauge Stainless Steel Tubing
    Description_FAB Moderate to Aggressive Exterior Exhaust Tone
    Description_FAB Connects After Factory Catalytic Converter
    Description_FAB Super 50 Series Performance Muffler
    Description_FAB Uses the Factory Hanger Locations
    Description_FAB Lifetime Limited Warranty
    Description_FAB Easy Installation
    Description_ABR SYS 99-06 GM
    Description_SHO SYS 99-06 GM 1500 SC
    Description_INV 99-06 GM 1500 SC/SB V8 AMT 409S
    Description_ASC Fits 1999-2007* (*2007 Classic body only) Chevrolet Silverado/GMC Sierra 1500 with 4.3L, 4.8L, 5.3L engine. Fits 2/4 wheel drive standard cab/short bed models only.
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Description_EXT 1999-2007* (*Classic body Only) Chevrolet Silverado/GMC Sierra 1500 4.3L, 4.8L, 5.3L engine, Standard Cab/Short Bed. Stainless Steel - Aggressive to moderate sound
    Description_MKT For the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder® system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 50™ Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of 3.00-inch diameter highly polished 304 stainless steel tips embossed with the Flowmaster® name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Notes: Fits 2/4 wheel drive standard cab/short bed models only. *Fits 2007 Classic body only. For Standard Cab/Short Bed models only.
    Description_FAB Includes Hangers and Hardware for an Easy Installation
    Description_FAB 3.00-inch Polished 304 Stainless Steel Embossed Tips
    Description_FAB Mandrel-bent 16-gauge Stainless Steel Tubing
    Description_FAB Moderate to Aggressive Exterior Exhaust Tone
    Description_FAB Connects After Factory Catalytic Converter
    Description_FAB Super 50 Series Performance Muffler
    Description_FAB Uses the Factory Hanger Locations
    Description_FAB Lifetime Limited Warranty
    Description_FAB Easy Installation
    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 3.00
    9877 Rolled Edge Angle Cut
    1163 Polished
    9881 No
    10104 13.00
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Single Wall
    9870 Dual Out Side
    200 Natural
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 3.00
    596 Flanged
    9871 2.50
    92 Yes
    9884 5.00
    1892 17.25
    4372 409 Stainless Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 No
    4368 No
    Muffler Included Yes
    9962 Slip-Fit
    4365 3.00
    4366 3.13
    9963 Slip-Fit
    4375 2
    Muffler Part Number Kit Only
    4374 1
    Muffler Series Super 50 Series
    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 2.50
    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 3.00
    9877 Rolled Edge Angle Cut
    1163 Polished
    9881 No
    10104 13.00
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Single Wall
    9870 Dual Out Side
    200 Natural
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 3.00
    596 Flanged
    9871 2.50
    92 Yes
    9884 5.00
    1892 17.25
    4372 409 Stainless Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 No
    4368 No
    Muffler Included Yes
    9962 Slip-Fit
    4365 3.00
    4366 3.13
    9963 Slip-Fit
    4375 2
    Muffler Part Number Kit Only
    4374 1
    Muffler Series Super 50 Series
    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 2.50
    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


    This Part Fits:

    Year Make Model Submodel Notes
    1999 Chevrolet Silverado 1500 Base
    1999 Chevrolet Silverado 1500 Base
    2000 Chevrolet Silverado 1500 Base
    2000 Chevrolet Silverado 1500 Base
    2001 Chevrolet Silverado 1500 Base
    2001 Chevrolet Silverado 1500 Base
    2002 Chevrolet Silverado 1500 Base
    2002 Chevrolet Silverado 1500 Base
    2003 Chevrolet Silverado 1500 Base
    2003 Chevrolet Silverado 1500 Base
    2004 Chevrolet Silverado 1500 Base
    2004 Chevrolet Silverado 1500 Base
    2005 Chevrolet Silverado 1500 Base
    2005 Chevrolet Silverado 1500 Base
    2006 Chevrolet Silverado 1500 Base
    2002 Chevrolet Silverado 1500 Custom
    2006 Chevrolet Silverado 1500 Hybrid
    1999 Chevrolet Silverado 1500 LS
    1999 Chevrolet Silverado 1500 LS
    2000 Chevrolet Silverado 1500 LS
    2000 Chevrolet Silverado 1500 LS
    2001 Chevrolet Silverado 1500 LS
    2001 Chevrolet Silverado 1500 LS
    2002 Chevrolet Silverado 1500 LS
    2002 Chevrolet Silverado 1500 LS
    2003 Chevrolet Silverado 1500 LS
    2003 Chevrolet Silverado 1500 LS
    2004 Chevrolet Silverado 1500 LS
    2004 Chevrolet Silverado 1500 LS
    2005 Chevrolet Silverado 1500 LS
    2005 Chevrolet Silverado 1500 LS
    2006 Chevrolet Silverado 1500 LS
    2006 Chevrolet Silverado 1500 LS
    2006 Chevrolet Silverado 1500 LS
    1999 Chevrolet Silverado 1500 LT
    2000 Chevrolet Silverado 1500 LT
    2001 Chevrolet Silverado 1500 LT
    2002 Chevrolet Silverado 1500 LT
    2002 Chevrolet Silverado 1500 LT
    2003 Chevrolet Silverado 1500 LT
    2003 Chevrolet Silverado 1500 LT
    2004 Chevrolet Silverado 1500 LT
    2004 Chevrolet Silverado 1500 LT
    2005 Chevrolet Silverado 1500 LT
    2005 Chevrolet Silverado 1500 LT
    2006 Chevrolet Silverado 1500 LT
    2006 Chevrolet Silverado 1500 LT
    2002 Chevrolet Silverado 1500 WT
    2002 Chevrolet Silverado 1500 WT
    2003 Chevrolet Silverado 1500 WT
    2003 Chevrolet Silverado 1500 WT
    2004 Chevrolet Silverado 1500 WT
    2004 Chevrolet Silverado 1500 WT
    2005 Chevrolet Silverado 1500 WT
    2005 Chevrolet Silverado 1500 WT
    2006 Chevrolet Silverado 1500 WT
    2006 Chevrolet Silverado 1500 WT
    2006 Chevrolet Silverado 1500 WT
    2004 Chevrolet Silverado 1500 Z71 Off-Road
    2005 Chevrolet Silverado 1500 Z71 Off-Road
    2007 Chevrolet Silverado 1500 Classic Hybrid
    2007 Chevrolet Silverado 1500 Classic LS
    2007 Chevrolet Silverado 1500 Classic LS
    2007 Chevrolet Silverado 1500 Classic LS
    2007 Chevrolet Silverado 1500 Classic LT
    2007 Chevrolet Silverado 1500 Classic LT
    2007 Chevrolet Silverado 1500 Classic WT
    2007 Chevrolet Silverado 1500 Classic WT
    2007 Chevrolet Silverado 1500 Classic WT
    2002 GMC Sierra 1500 Base
    2002 GMC Sierra 1500 Base
    2003 GMC Sierra 1500 Base
    2003 GMC Sierra 1500 Base
    2004 GMC Sierra 1500 Base
    2004 GMC Sierra 1500 Base
    2005 GMC Sierra 1500 Base
    2005 GMC Sierra 1500 Base
    2002 GMC Sierra 1500 HT
    2002 GMC Sierra 1500 HT
    2006 GMC Sierra 1500 Hybrid
    1999 GMC Sierra 1500 SL
    1999 GMC Sierra 1500 SL
    2000 GMC Sierra 1500 SL
    2000 GMC Sierra 1500 SL
    2001 GMC Sierra 1500 SL
    2001 GMC Sierra 1500 SL
    2002 GMC Sierra 1500 SL
    2002 GMC Sierra 1500 SL
    2003 GMC Sierra 1500 SL
    2003 GMC Sierra 1500 SL
    2006 GMC Sierra 1500 SL
    2006 GMC Sierra 1500 SL
    2006 GMC Sierra 1500 SL
    1999 GMC Sierra 1500 SLE
    1999 GMC Sierra 1500 SLE
    2000 GMC Sierra 1500 SLE
    2000 GMC Sierra 1500 SLE
    2001 GMC Sierra 1500 SLE
    2001 GMC Sierra 1500 SLE
    2002 GMC Sierra 1500 SLE
    2002 GMC Sierra 1500 SLE
    2003 GMC Sierra 1500 SLE
    2003 GMC Sierra 1500 SLE
    2004 GMC Sierra 1500 SLE
    2004 GMC Sierra 1500 SLE
    2005 GMC Sierra 1500 SLE
    2006 GMC Sierra 1500 SLE
    2006 GMC Sierra 1500 SLE
    1999 GMC Sierra 1500 SLT
    2000 GMC Sierra 1500 SLT
    2001 GMC Sierra 1500 SLT
    2002 GMC Sierra 1500 SLT
    2002 GMC Sierra 1500 SLT
    2003 GMC Sierra 1500 SLT
    2003 GMC Sierra 1500 SLT
    2004 GMC Sierra 1500 SLT
    2004 GMC Sierra 1500 SLT
    2006 GMC Sierra 1500 SLT
    2002 GMC Sierra 1500 WT
    2002 GMC Sierra 1500 WT
    2003 GMC Sierra 1500 WT
    2003 GMC Sierra 1500 WT
    2004 GMC Sierra 1500 WT
    2004 GMC Sierra 1500 WT
    2005 GMC Sierra 1500 WT
    2005 GMC Sierra 1500 WT
    2006 GMC Sierra 1500 WT
    2006 GMC Sierra 1500 WT
    2006 GMC Sierra 1500 WT
    2007 GMC Sierra 1500 Classic Hybrid
    2007 GMC Sierra 1500 Classic SL
    2007 GMC Sierra 1500 Classic SL
    2007 GMC Sierra 1500 Classic SL
    2007 GMC Sierra 1500 Classic SLE
    2007 GMC Sierra 1500 Classic SLE
    2007 GMC Sierra 1500 Classic SLT
    2007 GMC Sierra 1500 Classic WT
    2007 GMC Sierra 1500 Classic WT
    2007 GMC Sierra 1500 Classic 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.

    Recently Viewed