Vortec Central Port Fuel Injector Assembly

The OSIAS OT-FJ504 is a fuel injector assembly engineered for GM 4.3L V6 and 5.7L V8 Vortec engines. It is designed as a direct-fit replacement to address common issues such as rough idle, misfiring, lean conditions, and hard starting caused by faulty or leaking factory spider injectors. This assembly replaces the older central port fuel injection system, offering a modernized solution for improved fuel delivery. Key technical features include precision-wound solenoid windings for accurate computer-controlled fuel delivery and high-temperature Viton O-rings to ensure a prolonged, reliable seal under extreme heat. The unit is constructed with durable components to prevent internal corrosion and ensure consistent performance. Installation of this assembly requires mechanical expertise due to its placement beneath the upper intake manifold. It is strongly recommended to replace all injectors within the assembly simultaneously to ensure each cylinder receives uniform fuel flow. This unit is intended for various 1996-2002 Chevrolet, GMC, Cadillac, and Isuzu vehicles equipped with the compatible Vortec engines.