1988 Western Star 4900 Mufflers
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- Walker®Heavy Duty Steel Oval Truck Aluminized Exhaust MufflerWestern Star 4900 1988, Heavy Duty Steel Oval Truck Aluminized Exhaust Muffler by Walker®. Muffler Inlet Diameter: 3.5". Muffler Outlet Diameter: 4". Muffler Body Length: 32". Muffler Overall Length: 34.9". Walker offers a complete...Makes installation quick and easyOptimal OE-style fit and quality$259.04