Mufflers - 4 X 2 Drivetrain - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Flowmaster 50 Series Delta Flow 409 Stainless Steel 2.5 Inch Muffler 842551

Muffler, Delta Flow 50 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Stainless Steel, Black, Each

Part Number: FLO-842551

4.52 out of 5 stars ( 23 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Flowmaster 40 Series Delta Flow Steel 2.5 Inch Muffler 942543

Muffler, Delta Flow 40 Series, 2 1/2 in. Inlet/2 1/2 in. Outlet, Steel, Black, Each

Part Number: FLO-942543

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Walker Heavy-Duty Steel 4 Inch Muffler 21838

Mufflers, Heavy-Duty, Steel, Aluminized, 40.000 in. Overall Length, Mack, Each

Part Number: WLK-21838

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Walker Mega-Flow Steel 4 Inch Muffler 22965

Muffler, Mega-Flow, Round, Chambered, Steel, Aluminized, 4 in. Center Inlet and Outlet, 51 in. Length, Each

Part Number: WLK-22965

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 4 Inch Muffler 3891

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Heavy-Duty Steel 4 Inch Muffler 22899

Walker Heavy Duty Muffler

Part Number: WLK-22899

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker Quiet-Flow 3 Steel 3 Inch Muffler 21075

Muffler, Quiet-Flow 3, 3 in. Inlet/2 in. Outlet, Steel, Aluminized, Ford, Pickup, Each

Part Number: WLK-21075

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker School Bus Steel 3.5 Inch Muffler 22551

Muffler, School Bus, 3 1/2 in. Inlet/4 in. Outlet, Steel, Aluminized, Each

Part Number: WLK-22551

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 3.5 Inch Muffler 3716

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Heavy-Duty Steel 4 Inch Muffler 22936

Walker Heavy Duty Muffler

Part Number: WLK-22936

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 4 Inch Muffler 3891

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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AP Exhaust OE Replacement Steel 3 Inch Muffler 2506

AP Exhaust OE Replacement Steel 3 Inch Muffler 2506

Muffler, OE Replacement, Steel, Aluminized, Ford, 6.0L, Diesel, Each

Part Number: APH-2506

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026 if ordered today

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Estimated Ship Date: Jan 28, 2026 if ordered today

Walker School Bus Steel 2.5 Inch Muffler 22866

Muffler, School Bus, 2 1/2 in. Inlet/2 3/4 in. Outlet, Steel, Aluminized, Each

Part Number: WLK-22866

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 2.5 Inch Muffler 3697

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker School Bus Steel 2.5 Inch Muffler 22566

Muffler, School Bus, Round, Stainless Steel, Natural, 39.00 in. Overall Length, Each

Part Number: WLK-22566

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 2.5 Inch Muffler 3719

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Quiet-Flow SS 409 Stainless Steel 3 Inch Muffler 21583

Mufflers, Quiet-Flow SS, Stainless Steel, Aluminized, 3.00 in. Offset Inlet/Outlet, 24.000 in. Overall Length, Ford, V8, V10, Each

Part Number: WLK-21583

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust OE Replacement Steel 3 Inch Muffler 2568

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Heavy-Duty Steel 4 Inch Muffler 22449

Walker Heavy Duty Muffler

Part Number: WLK-22449

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 4 Inch Muffler 3710

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Heavy-Duty Steel 4 Inch Muffler 22888

Mufflers, Heavy-Duty, Steel, Aluminized, 4.00 in. Offset Inlet/Outlet, 42.000 in. Overall Length, Ford, 5.9L Diesel, 8.2L Diesel, Each

Part Number: WLK-22888

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker Heavy-Duty Steel 4 Inch Muffler 22941

Walker Heavy Duty Muffler

Part Number: WLK-22941

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 4 Inch Muffler 3712

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Replacement Steel 5 Inch Muffler 22552

Muffler, Replacement, 5 in. Inlet/5 in. Outlet, Steel, Aluminized, Each

Part Number: WLK-22552

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust TruckEx Steel 5 Inch Muffler 3647

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026

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Walker Heavy-Duty Steel 4 Inch Muffler 21833

Muffler, Heavy-Duty, Oval, Steel, Aluminized, 4.00 in. Offset Inlet/Outlet, 36.00 in. Overall Length, Each

Part Number: WLK-21833

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker Quiet-Flow SS 409 Stainless Steel 3 Inch Muffler 21507

Muffler, Quiet-Flow SS, Direct-Fit, Stainless Steel, Aluminized, Ford, Each

Part Number: WLK-21507

4.14 out of 5 stars ( 7 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust OE Replacement Steel 3.5 Inch Muffler 2557

5 out of 5 stars ( 2 )

Estimated Ship Date: Jan 30, 2026

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Walker Quiet-Flow SS 409 Stainless Steel 3 Inch Muffler 21593

Walker Quiet-Flow SS Muffler

Part Number: WLK-21593

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

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AP Exhaust OE Replacement Steel 3 Inch Muffler 2506

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026

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Walker Heavy-Duty Steel 4 Inch Muffler 22962

Walker Heavy Duty Muffler

Part Number: WLK-22962

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

AP Exhaust OE Replacement Steel 2.5 Inch Muffler 2048

Muffler, OE Replacement, Steel, Aluminized, Ford, Each

Part Number: APH-2048

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026 if ordered today

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Estimated Ship Date: Jan 28, 2026 if ordered today

Walker Quiet-Flow SS 409 Stainless Steel 3 Inch Muffler 21725

Quiet-Flow SS Muffler

Part Number: WLK-21725

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker Heavy-Duty Steel 4 Inch Muffler 22789

Walker Heavy Duty Muffler

Part Number: WLK-22789

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker Quiet-Flow SS 409 Stainless Steel 3 Inch Muffler 21542

Muffler, Quiet-Flow SS, Oval, Stainless Steel, Aluminized, 3.00 in. Offset Inlet/Outlet, 31.00 in. Overall Length, Each

Part Number: WLK-21542

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Walker Quiet-Flow SS 409 Stainless Steel 3 Inch Muffler 21447

Muffler, Quiet-Flow SS, Oval, Stainless Steel, Aluminized, 3.00 in. Offset Inlet/Outlet, 31.00 in. Overall Length, Each

Part Number: WLK-21447

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

AP Exhaust OE Replacement Steel 3 Inch Muffler 2506

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026

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