Holley Weld-On Fill Cap Kits

Holley weld-on fill cap kits include a cap CNC-machined from 6061-T6 billet aluminum with a bright, black anodized finish for great looks and corrosion protection. They're available with aluminum or steel weld bungs to match your application. Holley weld-on fill cap kit features include: * Allows for installation of a fill cap or inspection plug anywhere needed * Caps feature a laser-etched "Holley Equipped" logo * Easy-to-grip screw-on cap with O-ring seal and a 1.38 in. diameter opening * 1.950 in. O.D. / 1.400 in. I.D. weld bung * 1.810 in. diameter at the step of weld bung * 0.675 in. weld bung overall height * 0.570 in. height at the step of weld bung * 1 1/2-12 in. thread Show Less