This Cummins rocker arm part # 3400964 is a high-quality replacement for your commercial truck's ignition, charging, and starting system. Designed specifically for Cummins engines, this rocker arm is manufactured with the utmost attention to detail and rigorous quality control standards. With its durable construction and reliable performance, you can trust this rocker arm to keep your truck running smoothly and efficiently for miles to come. Whether you're a professional mechanic or a DIY enthusiast, this part is an essential component for any Cummins engine overhaul. Upgrade your truck's performance today with the Cummins rocker arm part # 3400964.