Small Block Chevy “400” Custom Engraved Flag Logo. These are classic Small Block Chevy finned valve covers that feature a laser engraved 400 Flag logo, perimeter bolt mounts, and a black powder coat finish. To view more valve covers, sale items, and other deals. Our valve covers are built from high-grade die-cast aluminum and proudly. Made in the USA. We specialize in CUSTOM LASER ENGRAVING our valve covers. To message us for more details! 1958-86 Small Block Chevy: 283, 305, 327, 350, 355, 383, 400 Engines. Exterior: 3-1/2″, Interior: 3″. YES – Most (Refer to measurements). Product must be unused and undamaged for full credit to be applied. CUSTOM ORDERS ARE Non-Returnable!