Fuel Your Drive! 🚗💨 Crafted from high-quality metal for long-lasting performance. Space-efficient design at just 2 x 4 x 2 inches. GM-recommended part for peace of mind and enhanced vehicle performance. Designed specifically for GM vehicles, ensuring optimal fuel atomization. Engineered to meet GM OE specifications for perfect fit and function. 2x4x2 in OE Spec Needle Valve The ACDelco GM Original Equipment 55577403 Direct Fuel Injector Assembly is a high-quality replacement part designed to atomize fuel efficiently in your GM vehicle's engine. Manufactured to meet GM's stringent OE specifications, this injector ensures reliability, durability, and seamless integration into your vehicle's fuel management system.