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

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

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Walker Quiet-Flow SS Steel 4 Inch Muffler 54637

4.5 out of 5 stars ( 21 )

Estimated Ship Date: Today

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AP Exhaust TruckEx Steel 4 Inch Muffler 3891

Muffler, TruckEx, Steel, Aluminized, Blue Bird, L6, Each

Part Number: APH-3891

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3666

Muffler, TruckEx, Steel, Aluminized, Blue Bird, Each

Part Number: APH-3666

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3712

Muffler, TruckEx, Steel, Aluminized, Blue Bird, 5.9, 6.6, 7.2, 8.3L, Each

Part Number: APH-3712

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3710

Muffler, TruckEx, Steel, Aluminized, Chevy, L6, V8, Each

Part Number: APH-3710

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3937

Muffler, TruckEx, 10.125 in. Round, 30.625 in. Overall Length, 4 in. Side Inlet, 4 in. Side Outlet, Each

Part Number: APH-3937

Not Yet Reviewed

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 3938

Muffler, TruckEx, 11.125 in. Round, 36 in. Overall Length, 4 in. Side Inlet, 4 in. Side Outlet, Each

Part Number: APH-3938

Not Yet Reviewed

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 3920

Muffler, TruckEx, Steel, Aluminized, Ford, L6, Each

Part Number: APH-3920

Not Yet Reviewed

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 3919

Muffler, TruckEx, 11 in. Round, 39.50 in. Overall Length, 4 in. Offset Inlet, 4 in. Side Outlet, Each

Part Number: APH-3919

Not Yet Reviewed

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 3625

Muffler, TruckEx, Steel, Aluminized, Thomas, Each

Part Number: APH-3625

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Walker Heavy-Duty Steel 4 Inch Muffler 21838

3.75 out of 5 stars ( 3 )

Estimated Ship Date: Today

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AP Exhaust TruckEx Steel 4 Inch Muffler 3926

Muffler, TruckEx, 9 in. Round, 48 in. Overall Length, 4 in. Side Inlet, 5 in. Center Outlet, Each

Part Number: APH-3926

Not Yet Reviewed

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 4227

Muffler, TruckEx, Steel, Aluminized, Blue Bird, GMC, Each

Part Number: APH-4227

Not Yet Reviewed

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 4246

Muffler, TruckEx, Steel, Aluminized, Thomas, 7.2L, Each

Part Number: APH-4246

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

AP Exhaust TruckEx Steel 4 Inch Muffler 3637

Mufflers, TruckEx, Steel, Aluminized, Round Case, 4.00 in. Side Inlet, 4.00 in. Offset Outlet, 32.25 in. Overall Length, Each

Part Number: APH-3637

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 28, 2026 if ordered today

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Estimated Ship Date: Jan 28, 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

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3928

Muffler, TruckEx, Steel, Aluminized, Blue Bird, Chevy, Each

Part Number: APH-3928

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3700

Muffler, TruckEx, Steel, Aluminized, Ford, Freightliner, Each

Part Number: APH-3700

Not Yet Reviewed

Estimated Ship Date: Jan 30, 2026 if ordered today

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Estimated Ship Date: Jan 30, 2026 if ordered today

AP Exhaust TruckEx Steel 4 Inch Muffler 3632

Muffler, TruckEx, Steel, Aluminized, Chevy, Ford, International, Thomas, Each

Part Number: APH-3632

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

MBRP Performance 5 in. Slip-On 304 Stainless Steel 4 Inch Muffler AT-9527PT

Mufflers, Performance Series, Slip-On, Round, Stainless Steel, Polaris, Each

Part Number: MBR-AT-9527PT

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today