1984 GMC Topkick Mufflers
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- Walker®Heavy Duty Steel Oval Truck Aluminized Exhaust MufflerGMC C7000 Naturally Aspirated 10.4L / 8.2L with Code # C7D 1984, Heavy Duty Steel Oval Truck Aluminized Exhaust Muffler by Walker®. Muffler Inlet Diameter: 4". Muffler Outlet Diameter: 4". Muffler Body Length: 31". Muffler Overall...Makes installation quick and easyOptimal OE-style fit and quality$220.12