Upgrade your heavy equipment's fuel system with this precision-engineered fuel rail pressure regulator sensor. Specifically designed to fit Caterpillar C18 988H, 545D, 555D, 535D, CB10, and C4.4 models, this sensor (part number 349-1178/3491178) plays a crucial role in maintaining optimal fuel pressure. The robust construction features a durable metal housing with protective coating and high-grade electrical connectors, ensuring reliable performance in demanding conditions. This sensor continuously monitors and adjusts fuel pressure to maintain engine efficiency and performance. Its direct-fit design matches OEM specifications for seamless installation and operation. Keep your equipment running at peak performance with this essential component that helps maintain proper fuel delivery and engine operation.