C15 Head Bolts from Blumaq Crafted with precision and durability in mind, these head bolts are specifically designed to meet the demanding requirements of Caterpillar 3406E/C15 engines. Whether you're performing routine maintenance or a complete engine overhaul, Blumaq 3406E/C15 Head Bolts provide the strength and reliability needed to keep your engine running smoothly. (26 bolts and 26 washers included in kit)