Availability
Mufflers
Muffler, Replacement, 4.0 in. Inlet/4.0 in. Outlet, 37.0 in. Length, Steel, Natural, Each
Part Number: WLK-21471
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, Superflow, Two 3 in. Inlets/Two 4 in. Outlets, 30 in. Length, Stainless Steel, Polished, Each
Part Number: GIB-788050S
Estimated Ship Date: Nov 27, 2026 if ordered today
Estimated Ship Date: Nov 27, 2026 if ordered today
Muffler, Mega-Flow, Round, Chambered, Steel, Aluminized, 4 in. Center Inlet and Outlet, 51 in. Length, Each
Part Number: WLK-22965
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, Quiet-Flow SS, Oval, Offset/Offset, Stainless Steel, Natural, Dodge, Each
Part Number: WLK-54637
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Walker Heavy Duty Muffler
Part Number: WLK-22664
Not Yet Reviewed
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, XR-1, 4 in. Inlet/4 in. Outlet, Stainless Steel, Each
Part Number: BOR-40741
Not Yet Reviewed
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, 4.00 in. Inlet/4.00 in. Outlet, 7 in. Round Case, 20 in Long Overall, Satin Stainless Steel, Each
Part Number: MPE-12775
Not Yet Reviewed
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, StreetPower Performance, Oval, Stainless, Polished, 2.5 in. Center Inlet, 4.0 in. Center Outlet, Each
Part Number: VPE-1046
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, Varex, Oval, 304 Stainless Steel, Brushed, 3.00 in. Center Inlet, 4.00 in. Center Outlet, Each
Part Number: XFO-VMK6-300
Not Yet Reviewed
Estimated Ship Date: Nov 11, 2026 if ordered today
Estimated Ship Date: Nov 11, 2026 if ordered today
Muffler, Varex, Round, 304 Stainless Steel, Polished, 2.50 in. Center Inlet, 4.00 in. Center Outlet, Each
Part Number: XFO-VMK2G-250
Estimated Ship Date: Nov 11, 2026 if ordered today
Estimated Ship Date: Nov 11, 2026 if ordered today
Mufflers, M-80, Round Case, Steel, Red Powdercoated, Single 4.00 in. Center Inlet/Outlet, 19.000 in. Overall Length, Each
Part Number: IMM-M80400
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, Ultra Flo Welded, Oval, 4 in. Inlet/4 in. Outlet, Stainless Steel, Chevy, GMC/Hummer, Each
Part Number: WLK-17557
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, Superflow, 4.00 in. Inlet/4.00 in. Outlet, Stainless Steel, Polished, Each
Part Number: GIB-788040S
Not Yet Reviewed
Estimated Ship Date: Nov 27, 2026 if ordered today
Estimated Ship Date: Nov 27, 2026 if ordered today
Muffler, 4.00 in. Inlet/4.00 in. Outlet, Stainless Steel, Natural, Each
Part Number: MPE-12771
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Mufflers, Turbine, Staight-through Louvered Core, 4.000 in. In/Out, Round, 20.00 in. Long x 6.00 in. O.D., 409 Stainless, Polished, Each
Part Number: JEX-JT4040
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Walker Heavy Duty Muffler
Part Number: WLK-22936
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Muffler 4" Inlet /Outlet 24" Body 30" Overall, T409 Universal Replaces all 30" overall length muff
Part Number: MBR-M91031
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, School Bus, 3 1/2 in. Inlet/4 in. Outlet, Steel, Aluminized, Each
Part Number: WLK-22551
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler with Tip, 2.25 in. Inlet/4.00 in. Outlet, Stainless Steel, Polished, Each
Part Number: MPE-14851
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Mufflers, Quiet-Flow SS, Stainless Steel, Natural, 17.000 in. Overall Length, Dodge, Ram, Each
Part Number: WLK-21649
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Estimated Ship Date: Monday 10/26/2026 if shipped by air
Muffler, TruckEx, Steel, Aluminized, Blue Bird, Each
Part Number: APH-3666
Not Yet Reviewed
Estimated Ship Date: Nov 11, 2026 if ordered today
Estimated Ship Date: Nov 11, 2026 if ordered today
Muffler, Heavy-Duty, Round, Steel, Aluminized, 3.500 in. Offset Inlet, 4.000 in. Side Outlet, 34.00 in. Overall Length, Universal, Each
Part Number: WLK-21074
Not Yet Reviewed
Estimated Ship Date: Nov 23, 2026 if ordered today
Estimated Ship Date: Nov 23, 2026 if ordered today
Muffler, TruckEx, Steel, Aluminized, Chevy, GMC, Each
Part Number: APH-3894
Not Yet Reviewed
Estimated Ship Date: Nov 11, 2026 if ordered today
Estimated Ship Date: Nov 11, 2026 if ordered today
Muffler, TruckEx, Steel, Aluminized, Universal, Each
Part Number: APH-3887
Not Yet Reviewed
Estimated Ship Date: Nov 11, 2026 if ordered today
Estimated Ship Date: Nov 11, 2026 if ordered today
Muffler, 4 in. Inlet/ Outlet, Titanium, Blue Burnt Tip, Each
Part Number: VPE-17566
Not Yet Reviewed
Estimated Ship Date: Dec 11, 2026 if ordered today
Estimated Ship Date: Dec 11, 2026 if ordered today
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