RADIATOR FILLER NECK BILLET for large cap 42mm

Howe Billet CNC Aluminum Radiator filler neck, constructed for durability in racing or street applications. Include's a 1/8 NPT female thread for a barb fitting (not included use HOW3434), also used for the plumbing of an expansion tank. 42mm ID. Suited For American V8 Type Radiators With Larger Radiator Caps.