• American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
  • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
  • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
  • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
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    • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 2001-2006 Chevrolet Suburban, Avalanche And Gmc Yukon Xl 1500 With 5.3L Engine Stainless Steel Aggressive To Moderate Sound Flowmaster
    • 817342.jpg
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    • aggressivemoderatesoundlevel.jpg
    • 817342.jpg
    • 817342_2.jpg
    • 817342_3.jpg
    • aggressivemoderatesoundlevel.jpg
    Sale!

    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817342

    Vendor: Flowmaster
    Part Number: 817342
    Save $147
    $1,171.95 $1,318.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    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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    Product DetailsFAQReviewsRelated Products
    This American Thunder system fits 2001-2006 GM Suburban, Avalanche and Yukon XL 1500 SUV's and increases the horsepower, torque and mileage of these popular trucks. The exhaust system is constructed from 16-gauge mandrel-bent stainless steel and has a flanged resonator assembly flowing into a specially tuned resonator and a Super 50 Series performance muffler producing a mild to moderate interior tone and a deep exterior sound. The dual 2.50-inch tailpipes exit out the side of the vehicle behind the rear tires and are finished off with large pair of 4.00-inch polished 304 stainless tips. All necessary parts and hardware are included for a great fitting installation and is covered by Limited Lifetime Warranty.


    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 817342


    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 7.5
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Double 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
    Resonator (Front) Body Height 4.00
    Resonator (Front) Body Length 12.25
    Resonator (Front) Body Width 8.00
    Resonator (Front) Type Chambered
    Resonator (Rear) Body Height 8.00
    Resonator (Rear) Body Length 12.25
    Resonator (Rear) Body Width 4.00
    Resonator (Rear) Type Chambered
    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 2WD
    Drive 4WD
    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 7.5
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Double 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
    Resonator (Front) Body Height 4.00
    Resonator (Front) Body Length 12.25
    Resonator (Front) Body Width 8.00
    Resonator (Front) Type Chambered
    Resonator (Rear) Body Height 8.00
    Resonator (Rear) Body Length 12.25
    Resonator (Rear) Body Width 4.00
    Resonator (Rear) Type Chambered
    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 2WD
    Drive 4WD
    9885 10.00
    Description_ABR SYS 01-06 SU
    Description_SHO SYS 01-06 SUB/AVAL/Y
    Description_INV 01-06 SUB/AVAL/YKN XL AMT DOS 409S
    Description_ASC Does Not Fit with Auto-Leveling Option.
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Description_EXT 2001-2006 Chevrolet Suburban, Avalanche and GMC Yukon XL 1500 with 5.3L engine. Stainless Steel - Aggressive to moderate sound
    Description_MKT This American Thunder system fits 2001-2006 GM Suburban, Avalanche and Yukon XL 1500 SUV's and increases the horsepower, torque and mileage of these popular trucks. The exhaust system is constructed from 16-gauge mandrel-bent stainless steel and has a flanged resonator assembly flowing into a specially tuned resonator and a Super 50 Series performance muffler producing a mild to moderate interior tone and a deep exterior sound. The dual 2.50-inch tailpipes exit out the side of the vehicle behind the rear tires and are finished off with large pair of 4.00-inch polished 304 stainless tips. All necessary parts and hardware are included for a great fitting installation and is covered by Limited Lifetime Warranty.
    Description_FAB Includes Hangers and Hardware for an Easy Installation
    Description_FAB Moderate Exterior Exhaust Note with Mild Interior Tone
    Description_FAB Dual 4.00-inch Polished 304 Stainless Steel Tips
    Description_FAB Mandrel-bent 16-gauge Stainless Steel Tubing
    Description_FAB Connects After Factory Catalytic Converter
    Description_FAB Super 50 Series Performance Muffler
    Description_FAB Includes Specially Tuned Resonator
    Description_FAB Uses the Factory Hanger Locations
    Description_FAB Performance Look of Duals
    Description_FAB Lifetime Limited Warranty
    Description_ABR SYS 01-06 SU
    Description_SHO SYS 01-06 SUB/AVAL/Y
    Description_INV 01-06 SUB/AVAL/YKN XL AMT DOS 409S
    Description_ASC Does Not Fit with Auto-Leveling Option.
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Description_EXT 2001-2006 Chevrolet Suburban, Avalanche and GMC Yukon XL 1500 with 5.3L engine. Stainless Steel - Aggressive to moderate sound
    Description_MKT This American Thunder system fits 2001-2006 GM Suburban, Avalanche and Yukon XL 1500 SUV's and increases the horsepower, torque and mileage of these popular trucks. The exhaust system is constructed from 16-gauge mandrel-bent stainless steel and has a flanged resonator assembly flowing into a specially tuned resonator and a Super 50 Series performance muffler producing a mild to moderate interior tone and a deep exterior sound. The dual 2.50-inch tailpipes exit out the side of the vehicle behind the rear tires and are finished off with large pair of 4.00-inch polished 304 stainless tips. All necessary parts and hardware are included for a great fitting installation and is covered by Limited Lifetime Warranty.
    Description_FAB Includes Hangers and Hardware for an Easy Installation
    Description_FAB Moderate Exterior Exhaust Note with Mild Interior Tone
    Description_FAB Dual 4.00-inch Polished 304 Stainless Steel Tips
    Description_FAB Mandrel-bent 16-gauge Stainless Steel Tubing
    Description_FAB Connects After Factory Catalytic Converter
    Description_FAB Super 50 Series Performance Muffler
    Description_FAB Includes Specially Tuned Resonator
    Description_FAB Uses the Factory Hanger Locations
    Description_FAB Performance Look of Duals
    Description_FAB Lifetime Limited Warranty


    This Part Fits:

    Year Make Model Submodel Notes
    2002 Chevrolet Avalanche 1500 Base
    2003 Chevrolet Avalanche 1500 Base
    2004 Chevrolet Avalanche 1500 Base
    2005 Chevrolet Avalanche 1500 Base
    2002 Chevrolet Avalanche 1500 North Face
    2003 Chevrolet Avalanche 1500 North Face
    2002 Chevrolet Avalanche 1500 On Road Edition
    2003 Chevrolet Avalanche 1500 On Road Edition
    2003 Chevrolet Avalanche 1500 WBH
    2004 Chevrolet Avalanche 1500 Z66
    2005 Chevrolet Avalanche 1500 Z66
    2002 Chevrolet Avalanche 1500 Z71
    2003 Chevrolet Avalanche 1500 Z71
    2004 Chevrolet Avalanche 1500 Z71
    2005 Chevrolet Avalanche 1500 Z71
    2001 Chevrolet Suburban 1500 LS
    2002 Chevrolet Suburban 1500 LS
    2003 Chevrolet Suburban 1500 LS
    2004 Chevrolet Suburban 1500 LS
    2005 Chevrolet Suburban 1500 LS
    2006 Chevrolet Suburban 1500 LS
    2001 Chevrolet Suburban 1500 LT
    2002 Chevrolet Suburban 1500 LT
    2003 Chevrolet Suburban 1500 LT
    2004 Chevrolet Suburban 1500 LT
    2005 Chevrolet Suburban 1500 LT
    2006 Chevrolet Suburban 1500 LT
    2002 Chevrolet Suburban 1500 Z71
    2003 Chevrolet Suburban 1500 Z71
    2004 Chevrolet Suburban 1500 Z71
    2005 Chevrolet Suburban 1500 Z71
    2006 GMC Yukon XL 1500 SL
    2001 GMC Yukon XL 1500 SLE
    2002 GMC Yukon XL 1500 SLE
    2003 GMC Yukon XL 1500 SLE
    2004 GMC Yukon XL 1500 SLE
    2005 GMC Yukon XL 1500 SLE
    2006 GMC Yukon XL 1500 SLE
    2001 GMC Yukon XL 1500 SLT
    2002 GMC Yukon XL 1500 SLT
    2003 GMC Yukon XL 1500 SLT
    2004 GMC Yukon XL 1500 SLT
    2005 GMC Yukon XL 1500 SLT
    2006 GMC Yukon XL 1500 SLT
    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.
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    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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