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Product Summary

Universal Fit, 2.5" Inlet Diameter, 3" Outlet Diameter

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    Key Specs

    MFG. Part #8425453
    BrandFlowmaster
    Inlet Diameter2.5"
    Outlet Diameter3"
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    Flowmaster 8425453 Details

    Flowmaster’s Super 44 muffler delivers a powerful rich tone and is the most aggressive, deepest sounding, highest performing 2 chamber street muffler we’ve ever built! Available in 409S Stainless Steel with a Lifetime Limited Warranty, these mufflers feature our advanced Delta Flow Technology design and are fully MIG-welded for maximum durability. This new dual in/single out configuration is perfect for applications that require one muffler for both exhaust pipes to pass through and has 2.50 inch dual inlets and 3 inch center outlet with 3.50 inch internals for maximum performance.

    Rebates

    Holley IRS Sale 2026

    Save 10% instantly on select products across the Holley family of performance brands during the annual Holley I.R.S.Tax Sale. Instant rebate period has been extended and now runs from February 17, 2026 through April 19, 2026.

    Flowmaster 8425453 Specifications

    KEY SPECS
    MFG. Part #8425453
    BrandFlowmaster
    Inlet Diameter2.5"
    Outlet Diameter3"
    GENERAL
    Overall Length19.00"
    Overall Width9.50"
    Body Length13.00"
    Overall Thickness4"
    Material TypeStainless Steel
    FinishBlack
    Case ShapeOval
    Outlet LocationCenter
    Outlet QuantityOne
    Inlet QuantityTwo
    GTIN Code700042032389
    Sold in QuantityEach
    Customer Impersonation Script