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#3788425453
Flowmaster 8425453 Super 44 Series Muffler, 2.5 In/ 3.0 Out
$125.95
/each
Factory Shipped
$139.95
Save $14.00
Quantity
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Product Summary
Universal Fit, 2.5" Inlet Diameter, 3" Outlet Diameter
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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.
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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
Flowmaster 8425453 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 8425453 |
| Brand | Flowmaster |
| Inlet Diameter | 2.5" |
| Outlet Diameter | 3" |
| GENERAL | |
| Overall Length | 19.00" |
| Overall Width | 9.50" |
| Body Length | 13.00" |
| Overall Thickness | 4" |
| Material Type | Stainless Steel |
| Finish | Black |
| Case Shape | Oval |
| Outlet Location | Center |
| Outlet Quantity | One |
| Inlet Quantity | Two |
| GTIN Code | 700042032389 |
| Sold in Quantity | Each |

