Upper Coolant Housing Filler Neck B16 B18C5 16AN Fitting Type R Civic DC2 Si CRX •Chrysler for GMC Sierra 3500 Classic

for GMC Sierra 3500 Classic WT 6

Replace weak stock unit to Aluminum Racing Mount3

Direct Fit Adapter

145mm(5-3/4") diameter

this item cannot be installed on a California emissions equipped vehicle in the state of New York

Upper Coolant Housing Filler Neck B16 B18C5 16AN Fitting Type R Civic DC2 Si CRX •Chrysler for GMC Sierra 3500 ClassicUpper Coolant Housing Filler Neck B16 B18C5 16AN Fitting Type R Civic DC2 Si CRX The B16 B18C5 (Type R) Upper Coolant Housing offers a versatility you won't get anywhere else. We offer this with standard silicone hoses or AN fittings. This unit allows you to point the overflow fitting in any direction to allow clean and simple setup.