Vibrant Weld On Radiator Filler Neck - 42mm ID (1.65in)

Vibrant Performance Radiator Filler Necks are CNC Machined from durable 6061 Aluminum Alloy. They include a barbed nipple for plumbing to an expansion tank. Available in two sizes and are compatible with Vibrant Performance high pressure Aluminum Radiator Caps.  Replacement Hose Barb Fitting part #11642F.