Moroso 63488 - Filler Neck, Small Billet

Weld On Billet Aluminum Filler Neck for Small Radiator Caps, SAE Type B/43mm Incl. Screw In 1/8 in. NPT Hose Fitting Racing/Street Performance Applications Weld-On Billet Aluminum Filler Neck for SAE Type B Radiator Caps • Accepts Small Radiator Caps, SAE Type B/43mm • Made from 6061-T6 billet aluminum • This weld-on version can be used wherever a heavy-duty, custom-application filler neck is required • Includes screw-in 1/8" NPT hose fitting for expansion tanks