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    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248
    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248
    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248
    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248
    • Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248
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    • American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang Cobra With 4.6L Dohc Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang Cobra With 4.6L Dohc Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang Cobra With 4.6L Dohc Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Cat-Back Exhaust System 1999-2004 Ford Mustang Cobra With 4.6L Dohc Engine Aggressive To Moderate Sound Flowmaster
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    Sale!

    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248

    Vendor: Flowmaster
    SKU: BDXN_17248
    Save $116
    Sale Price $921.95 Regular Price $1,037.95
    Fast Fulfillment: In-stock parts typically ship same day or next business day.
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    For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. This dual out American Thunder cat-back exhaust system is the perfect choice with a 2.50-inch flanged pipe connecting directly to the catalytic converters, the mandrel-bent aluminized steel inlet tubes flow into a large case Super 40 Series performance mufflers for a deep powerful sound. The system uses the factory hanger locations for an easy installation and features dual 2.50-inch mandrel-bent tailpipes exiting out the back and are finished off with dual 3.00-inch polished stainless steel tips for a muscular look and sound. American Thunder systems deliver a moderate to aggressive exterior tone with a mild-moderate interior tone and are best suited for the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Comes with our 3-year Limited Warranty. If you prefer a full stainless steel exhaust system with a Lifetime Limited Warranty, check out system #817248.


    Flowmaster Flowmaster American Thunder Cat-back Exhaust System 17248


    Specifications:

    Brand Flowmaster
    Description_ABR SYS 99-04 MU
    California Proposition 65 Yes
    Description_SHO SYS 99-04 MUSTANG CO
    California Proposition 65 Chemical Name Nickel (Metallic)
    Description_INV 99-04 MUSTANG COBRA 4.6L DOHC AMT
    California Proposition 65 Chemical Name Chromium (hexavalent compounds)
    Description_ASC Fits 1999-2004 Ford Mustang Cobra with 4.6L DOHC engine.
    CARB (California) Compliant Yes
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    Catalytic Converter Included No
    Description_EXT 1999-2004 Ford Mustang Cobra with 4.6L DOHC engine. - Aggressive to moderate sound
    2874 0
    Description_MKT For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. This dual out American Thunder cat-back exhaust system is the perfect choice with a 2.50-inch flanged pipe connecting directly to the catalytic converters, the mandrel-bent aluminized steel inlet tubes flow into a large case Super 40 Series performance mufflers for a deep powerful sound. The system uses the factory hanger locations for an easy installation and features dual 2.50-inch mandrel-bent tailpipes exiting out the back and are finished off with dual 3.00-inch polished stainless steel tips for a muscular look and sound. American Thunder systems deliver a moderate to aggressive exterior tone with a mild-moderate interior tone and are best suited for the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Comes with our 3-year Limited Warranty. If you prefer a full stainless steel exhaust system with a Lifetime Limited Warranty, check out system #817248.
    Category Exhaust
    Description_FAB Includes Hangers and Hardware for an Easy Installation
    3728 Flat Band
    Description_FAB Mandrel-bent 16-gauge Aluminized Steel Tubing
    1882 Yes
    Description_FAB Includes 3.00-inch Polished Stainless Steel Tips
    Emission Code 5
    Description_FAB Covered by our 3-year Limited Warranty
    Exhaust Series American Thunder
    Description_FAB Dyno Tuned for Maximum Performance
    9874 Welded
    Description_FAB Super 40 Series Performance Mufflers
    9876 Angled
    Description_FAB Over 35+years of Flowmaster Quality
    1162 3.00
    Description_FAB Uses the Factory Hanger Locations
    9877 Slash Cut
    Description_FAB Moderate Exterior Exhaust Tone
    1163 Polished
    Description_FAB Quick and Easy Installation
    9881 No
    Description_ABR SYS 99-04 MU
    10104 12.875
    Description_SHO SYS 99-04 MUSTANG CO
    1164 304 Stainless Steel
    Description_INV 99-04 MUSTANG COBRA 4.6L DOHC AMT
    1161 2
    Description_ASC Fits 1999-2004 Ford Mustang Cobra with 4.6L DOHC engine.
    9878 No
    Description_DES Flowmaster American Thunder Cat-back Exhaust System
    10980 Round
    Description_EXT 1999-2004 Ford Mustang Cobra with 4.6L DOHC engine. - Aggressive to moderate sound
    9875 Single Wall
    Description_MKT For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster Cat-back exhaust system provides. This dual out American Thunder cat-back exhaust system is the perfect choice with a 2.50-inch flanged pipe connecting directly to the catalytic converters, the mandrel-bent aluminized steel inlet tubes flow into a large case Super 40 Series performance mufflers for a deep powerful sound. The system uses the factory hanger locations for an easy installation and features dual 2.50-inch mandrel-bent tailpipes exiting out the back and are finished off with dual 3.00-inch polished stainless steel tips for a muscular look and sound. American Thunder systems deliver a moderate to aggressive exterior tone with a mild-moderate interior tone and are best suited for the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Comes with our 3-year Limited Warranty. If you prefer a full stainless steel exhaust system with a Lifetime Limited Warranty, check out system #817248.
    9870 Dual Out Rear
    Description_FAB Includes Hangers and Hardware for an Easy Installation
    200 Aluminized
    Description_FAB Mandrel-bent 16-gauge Aluminized Steel Tubing
    353 No
    Description_FAB Includes 3.00-inch Polished Stainless Steel Tips
    3390 Performance
    Description_FAB Covered by our 3-year Limited Warranty
    4364 Yes
    Description_FAB Dyno Tuned for Maximum Performance
    Heat Shield Included No
    Description_FAB Super 40 Series Performance Mufflers
    Inlet Diameter 2.50
    Description_FAB Over 35+years of Flowmaster Quality
    596 Flanged
    Description_FAB Uses the Factory Hanger Locations
    9871 2.50
    Description_FAB Moderate Exterior Exhaust Tone
    92 No
    Description_FAB Quick and Easy Installation
    9884 5.00
    1892 13.50
    4372 Aluminized Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 Yes
    4368 No
    Muffler Included Yes
    9962 Welded Flange
    4365 2.50
    4366 2.63
    9963 Slip-Fit
    4375 1
    Muffler Part Number Kit Only
    4374 2
    Muffler Series Super 40 Series
    1174 Chambered
    part type Exhaust System
    3530 Aluminized 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 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
    9874 Welded
    9876 Angled
    1162 3.00
    9877 Slash Cut
    1163 Polished
    9881 No
    10104 12.875
    1164 304 Stainless Steel
    1161 2
    9878 No
    10980 Round
    9875 Single Wall
    9870 Dual Out Rear
    200 Aluminized
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 2.50
    596 Flanged
    9871 2.50
    92 No
    9884 5.00
    1892 13.50
    4372 Aluminized Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 Yes
    4368 No
    Muffler Included Yes
    9962 Welded Flange
    4365 2.50
    4366 2.63
    9963 Slip-Fit
    4375 1
    Muffler Part Number Kit Only
    4374 2
    Muffler Series Super 40 Series
    1174 Chambered
    part type Exhaust System
    3530 Aluminized 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 2WD
    9885 10.00


    This Part Fits:

    Year Make Model Submodel Notes
    Shipping Policy

    Shipping Policy Last Updated: April 2026

    We're committed to getting your order to you as quickly and transparently as possible. Here's everything you need to know about how we ship.

    Order Cancellations

    Once an order is placed, cancellations are not guaranteed as orders are sent to fulfillment quickly. If you need to cancel, contact us immediately at sales@berryperformancesales.com. If a cancellation is possible, the buyer is responsible for any transaction fees incurred. If the order has already shipped, it cannot be cancelled and must go through our standard return process.

    Processing Time

    In-stock orders are typically processed and shipped within 1–2 business days of receiving payment, unless otherwise noted on the product page. Orders placed on weekends or holidays will be processed on the next business day.

    Shipping Costs

    Shipping costs are calculated at checkout based on the shipping method selected, package weight and dimensions, and destination address. You can review all shipping costs before finalizing your purchase.

    Estimated Delivery Times

    Domestic orders typically arrive within 1–7 business days after shipment, depending on your location and the carrier. Please note that delivery times are estimates and are not guaranteed. Delays due to weather, carrier volume, or other circumstances beyond our control may occur.

    Tracking Information

    Once your order ships, you will receive a confirmation email with tracking information. Use this to monitor your package's progress. If your tracking has not updated within 48 hours of receiving your confirmation email, please contact us and we'll look into it.

    Shipping Address

    Please ensure your shipping address is accurate and complete before placing your order. If you realize an error after ordering, contact us immediately at sales@berryperformancesales.com — we will do our best to make the correction, but changes cannot be guaranteed once an order is in fulfillment. We are not responsible for orders shipped to incorrect or undeliverable addresses due to customer error.

    Please note: We are unable to ship to P.O. Boxes. Please provide a physical delivery address at checkout.

    Lost or Stolen Packages

    If your tracking shows your order as delivered but you have not received it, please take the following steps:

    • Check around your property and with neighbors
    • Confirm the shipping address on your order was correct
    • Contact the carrier directly with your tracking number

    If the issue remains unresolved, contact us at sales@berryperformancesales.com within 5 business days of the marked delivery date. We will work with you and the carrier to investigate. Berry Performance Sales is not responsible for packages confirmed as delivered by the carrier or for packages stolen after delivery.

    Damaged in Transit

    If your order arrives visibly damaged, please refer to our Returns & Refunds policy for instructions on how to report the issue. Carrier damage claims must be reported within 48 hours of delivery.

    International Shipping

    We do ship internationally! Because shipping costs, carrier options, and transit times vary significantly by destination, international orders require a custom quote prior to purchase. To request a shipping quote, contact us at sales@berryperformancesales.com with the following:

    • Your country and full delivery address
    • The item(s) you are interested in ordering

    We will respond with a shipping quote as quickly as possible. Please note that customs duties, import taxes, and any other fees charged upon delivery are the sole responsibility of the recipient and are not included in your shipping quote. We recommend checking with your local customs office before placing your order.

    Off-Road Use Disclaimer

    All products are sold for off-road use only unless otherwise specified. The buyer assumes full responsibility for installation and operation. Berry Performance Sales is not liable for any incidental, indirect, or consequential damages including engine failure, labor charges, or vehicle downtime resulting from the use of any product sold. By placing an order, you acknowledge and accept these terms.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Return Policy

    Returns & Refunds Last Updated: April 2026

    We want you to love what you ordered. If something isn't right, here's everything you need to know.

    30-Day Return Window

    You have 30 days from the date of purchase to initiate a return. After this window, we are unable to accept returns. We do not offer exchanges — all approved returns are refunded per the terms below.

    How to Initiate a Return

    To request a return, contact us at sales@berryperformancesales.com with your order number and reason for return. All returns must be approved by our team before any item is shipped back to us. Once your return has been approved, your item must be shipped within 10 days of approval. Items shipped without prior approval or outside this window will be refused and returned to sender.

    Return Conditions

    To be eligible for a return, items must be:

    • Unused and in original condition
    • In original packaging
    • Inclusive of all parts and accessories

    Custom ordered products are non-returnable. If you're unsure whether your item qualifies, contact us before purchasing.

    Once we receive your return, we will inspect the item before processing any refund. We reserve the right to deny or adjust your refund if the item is received in a condition that differs from what was originally shipped — including signs of use, missing parts, or damage that occurred after delivery.

    Fees to Know Upfront

    We believe in being transparent about costs:

    • Restocking Fee: 20% — deducted from all return refunds
    • Return Shipping: Buyer's responsibility on all standard returns
    • Cancellation (Installment/Payment Plan): 7% fee to cover transaction costs
    • Cancellation (Credit Card/PayPal): 3.5% processing fee

    Damaged or Defective Items

    If your order arrives damaged or defective, you must contact us within 48 hours of delivery at sales@berryperformancesales.com. Claims reported outside this window may not be eligible for resolution.

    When contacting us, please include:

    • Your order number
    • A description of the issue
    • Clear photos or video of the damage or defect

    If your item was damaged during shipping, this is handled as a carrier claim separate from our standard return process — we will assist you in filing that claim. Items confirmed to be defective due to a manufacturing or fulfillment error will have return shipping costs covered by Berry Performance Sales.

    Refunds

    Once we receive and inspect your return, refunds are processed within 3–5 business days back to your original payment method. You'll receive a confirmation once it's been issued.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    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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