2003 GMC W4500 Forward equipped with 6.0L V8 Gas OHV, 5.7L V8 Gas OHV, 4.8L L4 Diesel Turbo
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with 5.5in x 5.875in x 1in Core with 0.6875in Diameter Inlet with 0.6875in Diameter Outlet
2003 GMC W4500 Forward equipped with 6.0L V8 Gas OHV, 5.7L V8 Gas OHV, 4.8L L4 Diesel Turbo
with 5.5in x 5.875in x 1in Core with 0.6875in Diameter Inlet with 0.6875in Diameter Outlet