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    • American Thunder Crossmember-Back Exhaust System Fits 1967-1974 Mopar A-Body Cars With V8 Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Crossmember-Back Exhaust System Fits 1967-1974 Mopar A-Body Cars With V8 Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Crossmember-Back Exhaust System Fits 1967-1974 Mopar A-Body Cars With V8 Engine Aggressive To Moderate Sound Flowmaster
    • American Thunder Crossmember-Back Exhaust System Fits 1967-1974 Mopar A-Body Cars With V8 Engine Aggressive To Moderate Sound Flowmaster
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    Sale!

    Flowmaster Fits 1967-1974 Mopar A-Body cars with V8 engine. - Aggressive to moderate sound 817585

    Vendor: Flowmaster
    SKU: BDXN_817585
    Save $154
    Sale Price $1,229.95 Regular Price $1,383.95
    Fast Fulfillment: In-stock parts typically ship same day or next business day.
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    For the person who is looking for a complete Crossmember-Back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 in. systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. 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.


    Flowmaster Fits 1967-1974 Mopar A-Body cars with V8 engine. - Aggressive to moderate sound 817585


    Specifications:

    Description_ABR SYS 67-74 MO
    Description_SHO SYS 67-74 MOPAR A-BO
    Description_INV 67-74 MOPAR A-BODY 2.50" AMT 409S
    Description_ASC Fits 1967-1974 Mopar A-Body, such as Dodge Dart, Demon, Plymouth Barracuda, Duster, Valiant with V8 engine. Including convertibles.
    Description_DES Flowmaster American Thunder Crossmember-Back Exhaust System
    Description_EXT Fits 1967-1974 Mopar A-Body cars with V8 engine. - Aggressive to moderate sound
    Description_MKT For the person who is looking for a complete Crossmember-Back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 in. systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. 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.
    Description_FAB Premium Quality
    Description_FAB Improved Horsepower, Torque and Engine Efficiency
    Description_FAB Delta Flow Technology
    Description_FAB Super 40 Sound Level
    Description_ABR SYS 67-74 MO
    Description_SHO SYS 67-74 MOPAR A-BO
    Description_INV 67-74 MOPAR A-BODY 2.50" AMT 409S
    Description_ASC Fits 1967-1974 Mopar A-Body, such as Dodge Dart, Demon, Plymouth Barracuda, Duster, Valiant with V8 engine. Including convertibles.
    Description_DES Flowmaster American Thunder Crossmember-Back Exhaust System
    Description_EXT Fits 1967-1974 Mopar A-Body cars with V8 engine. - Aggressive to moderate sound
    Description_MKT For the person who is looking for a complete Crossmember-Back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 in. systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. 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.
    Description_FAB Premium Quality
    Description_FAB Improved Horsepower, Torque and Engine Efficiency
    Description_FAB Delta Flow Technology
    Description_FAB Super 40 Sound Level
    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 Clamp-On
    Exhaust Tip Quantity Sold Separately
    1161 0
    10980 Round
    9870 Dual Out Rear
    200 Natural
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 2.50
    596 Weld-On
    9871 2.50
    92 Yes
    11021 5.00
    11022 13.50
    11023 10.00
    11064 Chambered
    11048 5.00
    11049 13.50
    11050 10.00
    11073 Chambered
    4371 10.00
    9884 5.00
    1892 13.50
    4372 409 Stainless Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 No
    4368 No
    Muffler Included Yes
    9962 Slip-Fit
    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 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
    Type Crossmember-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 Clamp-On
    Exhaust Tip Quantity Sold Separately
    1161 0
    10980 Round
    9870 Dual Out Rear
    200 Natural
    353 No
    3390 Performance
    4364 Yes
    Heat Shield Included No
    Inlet Diameter 2.50
    596 Weld-On
    9871 2.50
    92 Yes
    11021 5.00
    11022 13.50
    11023 10.00
    11064 Chambered
    11048 5.00
    11049 13.50
    11050 10.00
    11073 Chambered
    4371 10.00
    9884 5.00
    1892 13.50
    4372 409 Stainless Steel
    4373 Oval
    9882 Black High-Temperature Paint Finish
    4367 No
    4368 No
    Muffler Included Yes
    9962 Slip-Fit
    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 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
    Type Crossmember-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
    1967 Dodge Dart 270
    1967 Dodge Dart 270
    1968 Dodge Dart 270
    1968 Dodge Dart 270
    1968 Dodge Dart 270
    1968 Dodge Dart 270
    1967 Dodge Dart Base
    1967 Dodge Dart Base
    1968 Dodge Dart Base
    1968 Dodge Dart Base
    1968 Dodge Dart Base
    1968 Dodge Dart Base
    1969 Dodge Dart Base
    1969 Dodge Dart Base
    1969 Dodge Dart Base
    1969 Dodge Dart Base
    1970 Dodge Dart Base
    1970 Dodge Dart Base
    1971 Dodge Dart Base
    1971 Dodge Dart Base
    1971 Dodge Dart Base
    1972 Dodge Dart Base
    1972 Dodge Dart Base
    1972 Dodge Dart Base
    1973 Dodge Dart Base
    1973 Dodge Dart Base
    1973 Dodge Dart Base
    1974 Dodge Dart Base
    1974 Dodge Dart Base
    1969 Dodge Dart Custom
    1969 Dodge Dart Custom
    1969 Dodge Dart Custom
    1969 Dodge Dart Custom
    1970 Dodge Dart Custom
    1970 Dodge Dart Custom
    1971 Dodge Dart Custom
    1971 Dodge Dart Custom
    1971 Dodge Dart Custom
    1972 Dodge Dart Custom
    1972 Dodge Dart Custom
    1972 Dodge Dart Custom
    1973 Dodge Dart Custom
    1973 Dodge Dart Custom
    1973 Dodge Dart Custom
    1974 Dodge Dart Custom
    1974 Dodge Dart Custom
    1971 Dodge Dart Demon
    1971 Dodge Dart Demon
    1971 Dodge Dart Demon
    1972 Dodge Dart Demon
    1972 Dodge Dart Demon
    1972 Dodge Dart Demon
    1971 Dodge Dart Demon 340
    1972 Dodge Dart Demon 340
    1967 Dodge Dart GT
    1967 Dodge Dart GT
    1968 Dodge Dart GT
    1968 Dodge Dart GT
    1968 Dodge Dart GT
    1968 Dodge Dart GT
    1969 Dodge Dart GT
    1969 Dodge Dart GT
    1969 Dodge Dart GT
    1969 Dodge Dart GT
    1968 Dodge Dart GTS
    1968 Dodge Dart GTS
    1968 Dodge Dart GTS
    1968 Dodge Dart GTS
    1969 Dodge Dart GTS
    1969 Dodge Dart GTS
    1969 Dodge Dart GTS
    1969 Dodge Dart GTS
    1971 Dodge Dart Special
    1971 Dodge Dart Special
    1971 Dodge Dart Special
    1972 Dodge Dart Special
    1972 Dodge Dart Special
    1972 Dodge Dart Special
    1973 Dodge Dart Special
    1973 Dodge Dart Special
    1973 Dodge Dart Special
    1974 Dodge Dart Special
    1974 Dodge Dart Special
    1974 Dodge Dart Special Edition
    1974 Dodge Dart Special Edition
    1973 Dodge Dart Sport
    1973 Dodge Dart Sport
    1973 Dodge Dart Sport
    1974 Dodge Dart Sport
    1974 Dodge Dart Sport
    1973 Dodge Dart Sport 340
    1974 Dodge Dart Sport 360
    1969 Dodge Dart Swinger
    1969 Dodge Dart Swinger
    1969 Dodge Dart Swinger
    1969 Dodge Dart Swinger
    1970 Dodge Dart Swinger
    1970 Dodge Dart Swinger
    1971 Dodge Dart Swinger
    1971 Dodge Dart Swinger
    1971 Dodge Dart Swinger
    1972 Dodge Dart Swinger
    1972 Dodge Dart Swinger
    1972 Dodge Dart Swinger
    1973 Dodge Dart Swinger
    1973 Dodge Dart Swinger
    1973 Dodge Dart Swinger
    1974 Dodge Dart Swinger
    1974 Dodge Dart Swinger
    1969 Dodge Dart Swinger 340
    1970 Dodge Dart Swinger 340
    1967 Plymouth Barracuda Base
    1967 Plymouth Barracuda Base
    1967 Plymouth Barracuda Base
    1968 Plymouth Barracuda Base
    1968 Plymouth Barracuda Base
    1968 Plymouth Barracuda Base
    1968 Plymouth Barracuda Base
    1968 Plymouth Barracuda Base
    1969 Plymouth Barracuda Base
    1969 Plymouth Barracuda Base
    1969 Plymouth Barracuda Base
    1969 Plymouth Barracuda Base
    1970 Plymouth Duster 340
    1971 Plymouth Duster 340
    1972 Plymouth Duster 340
    1973 Plymouth Duster 340
    1974 Plymouth Duster 360
    1970 Plymouth Duster Base
    1970 Plymouth Duster Base
    1971 Plymouth Duster Base
    1971 Plymouth Duster Base
    1972 Plymouth Duster Base
    1972 Plymouth Duster Base
    1973 Plymouth Duster Base
    1973 Plymouth Duster Base
    1974 Plymouth Duster Base
    1974 Plymouth Duster Base
    1971 Plymouth Scamp Base
    1972 Plymouth Scamp Base
    1973 Plymouth Scamp Base
    1974 Plymouth Scamp Base
    1968 Plymouth Valiant 100
    1968 Plymouth Valiant 100
    1968 Plymouth Valiant 100
    1969 Plymouth Valiant 100
    1969 Plymouth Valiant 100
    1969 Plymouth Valiant 100
    1967 Plymouth Valiant Base
    1970 Plymouth Valiant Base
    1970 Plymouth Valiant Base
    1971 Plymouth Valiant Base
    1971 Plymouth Valiant Base
    1971 Plymouth Valiant Base
    1972 Plymouth Valiant Base
    1972 Plymouth Valiant Base
    1972 Plymouth Valiant Base
    1973 Plymouth Valiant Base
    1973 Plymouth Valiant Base
    1973 Plymouth Valiant Base
    1974 Plymouth Valiant Base
    1974 Plymouth Valiant Base
    1974 Plymouth Valiant Brougham
    1974 Plymouth Valiant Brougham
    1967 Plymouth Valiant Signet
    1968 Plymouth Valiant Signet
    1968 Plymouth Valiant Signet
    1968 Plymouth Valiant Signet
    1969 Plymouth Valiant Signet
    1969 Plymouth Valiant Signet
    1969 Plymouth Valiant Signet
    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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