Mufflers - 4.00 Inlet Diameter (in.) - Offset Inlet Location - In Stock Filter Options - Vendor In Stock Filter Options - Free Shipping on Orders Over $109 at Summit Racing

Walker Heavy-Duty Steel 4 Inch Muffler 21969

Muffler, Heavy-Duty, Round, Steel, Aluminized, 4.00 in. Offset Inlet/Outlet, 31.50 in. Overall Length, Each

Part Number: WLK-21969

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Walker Quiet-Flow SS Steel 4 Inch Muffler 54637

Muffler, Quiet-Flow SS, Oval, Offset/Offset, Stainless Steel, Natural, Dodge, Each

Part Number: WLK-54637

4.52 out of 5 stars ( 21 )

Estimated Ship Date: Tomorrow

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Walker Heavy-Duty Steel 4 Inch Muffler 22664

Walker Heavy Duty Muffler

Part Number: WLK-22664

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Walker Replacement Steel 4 Inch Muffler 22958

Muffler, Replacement, 4 in. Inlet/4 in. Outlet, Steel, Aluminized, Each

Part Number: WLK-22958

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Walker Quiet-Flow SS 409 Stainless Steel 4 Inch Muffler 21649

Mufflers, Quiet-Flow SS, Stainless Steel, Natural, 17.000 in. Overall Length, Dodge, Ram, Each

Part Number: WLK-21649

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Dynomax Ultra Flo Welded Steel 4 Inch Muffler 17557

Muffler, Ultra Flo Welded, Oval, 4 in. Inlet/4 in. Outlet, Stainless Steel, Chevy, GMC/Hummer, Each

Part Number: WLK-17557

3.17 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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AP Exhaust OE Replacement Steel 4 Inch Muffler 2519

AP Exhaust OE Replacement Steel 4 Inch Muffler 2519

Muffler, OE Replacement, Steel, Aluminized, Dodge, 5.9L, Diesel, Each

Part Number: APH-2519

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 29, 2026 if ordered today

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Estimated Ship Date: Jan 29, 2026 if ordered today

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 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

Need It Sooner? We recommend these similar substitute parts:

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 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

AP Exhaust MSL Maximum Steel 4 Inch Muffler 700476

Muffler, MSL, Oval, Baffled, Steel, Aluminized, 4.00 in. Offset Inlet/Outlet, 39.00 in. Overall Length, Each

Part Number: APH-700476

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 29, 2026 if ordered today

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Estimated Ship Date: Jan 29, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 4225

Mufflers, TruckEx, Steel, Aluminized, Round Case, 4.00 in. Offset Inlet/Outlet, 43.00 in. Overall Length, Freightliner, Each

Part Number: APH-4225

Not Yet Reviewed