Mufflers
16 ProductsExhaust Exhaust Categories (11)
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3.5" Inlet 4" Outlet Offset Oval 11 X 8 Muffler 562.U6354825115 IH Offset Oval Muffler3-1/2" ID Inlet, 4" ID Outlet, 12 Inlet Position, 6 Outlet Position, 8-1/4 X 11-1/2 Diameter. 30"...
- Regular price
- $331.99
- Sale price
- $331.99
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4" ID Inlet Outlet Muffler 10" X 44" 562.U6410 4" ID Inlet Outlet Muffler 10"Inlet Outlet Centered. 10" Diameter X 44.5" Shell. 51" Overall. Same As Automann 562.U6410, Dayton...
- Regular price
- $308.99
- Sale price
- $308.99
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4" ID Inlet Outlet Muffler 9" X 44.50" 562.U6409P 4" ID Inlet Outlet Muffler 9"9" Diameter X 44.5" Long Shell. 51" Overall. 4" ID Inlet, 4" ID Outlet Centered....
- Regular price
- $208.99
- Sale price
- $208.99
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4" Inlet 5" Outlet 10" X 15" Oval Muffler 562.U6451015 4" Inlet 5" Outlet 10" X 15" Oval Muffler 562.U6451015. Same As Automann 562.U6451015, Mack 2ME3106A, Grand Rock M-542, Grand...
- Regular price
- $529.99
- Sale price
- $529.99
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4" Inlet 5" Outlet Muffler 10" X 44" 562.U64510 4" Inlet 5" Outlet Muffler 10" X 44" 562.U64510. Type 1. 4" Inlet. 5" Outlet. 10" Diameter. 44.5" Body Length....
- Regular price
- $184.99
- Sale price
- $184.99
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4" Inlet 5" Outlet Muffler 9" X 44" 562.U64509 4" Inlet 5" Outlet Muffler 9" X 44" 562.U64509. Same As Automann 562.U64509, Grand Rock M-514, Grandrock M514, 1000MUF45944, 2ME3102,...
- Regular price
- $208.99
- Sale price
- $208.99
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4" Inlet 5" Outlet Muffler 9" X 44" 562.U645091 4" Inlet 5" Outlet Muffler 9" X 44" 562.U645091. Same As Automann 562.U645091, Grand Rock M-771, Grand Rock M771, Mack...
- Regular price
- $306.99
- Sale price
- $306.99
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4" Inlet Outlet Muffler 8.5" X 33" 562.U6485 4" Inlet Outlet Muffler 8.5" X 33" 562.U6485. Same As Automann 562.U6485, Grand Rock M-127, Grand Rock M127, M085171, M4485.
- Regular price
- $191.99
- Sale price
- $191.99
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4" Inlet Outlet Muffler 9" X 20" 562.U64092 4" Inlet Outlet Muffler 9" X 20" 562.U64092. Same As Automann 562.U64092, Mack 87Q400189.
- Regular price
- $249.99
- Sale price
- $249.99
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4" Inlet Outlet Resonator 9" X 10" 562.U64091 4" Inlet Outlet Resonator 9" X 10" 562.U64091. Same As Automann 562.U64091, M090362, Grand Rock M144, MR40, Grand Rock M-144.
- Regular price
- $132.99
- Sale price
- $132.99
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5" ID Inlet Outlet Muffler 10" X 44" 562.U6510 M5510 5" ID Inlet Outlet Muffler 10" 10" Diameter X 44" Shell. 51" Overall. Centered Inlet Outlet. Try In Place Of...
- Regular price
- $89.99
- Sale price
- $89.99
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5" ID Inlet Outlet Muffler 11" X 55" 562.U65110 5" ID Inlet Outlet Muffler 11" X 55" 562.U65110. Same As Automann 562.U65110, Grand Rock M-062, Grand Rock M062, Dynaflex...
- Regular price
- $330.99
- Sale price
- $330.99
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Mufflers Overview
The muffler (and resonator) reduces exhaust noise; a rusted-through or blown muffler gets loud and can fail noise regulations. Van Horn Truck Parts carries mufflers and resonators cross-referenced to Nelson, Donaldson, and Automann part numbers.
Match by inlet and outlet diameters and orientation, body diameter and length, and mounting.
Mechanic & Fitment Specs:
- Match by: Inlet/outlet diameter & orientation, body size, mounting
- Cross-references: Nelson, Donaldson, Automann
- Buying tip: Match inlet/outlet orientation, not just diameters
Family Owned Since 1982 · Shelby Township, MI











