Top Feed 1050X Fuel Injectors

The COBB Tuning Top Feed 1050X Fuel Injectors are engineered to support high-power Subaru STI builds that have outgrown the capacity of stock fuel injectors. Featuring a 1050cc/min flow rate, these injectors provide ample headroom, significantly reducing injector duty cycle under high power conditions and thus preventing potentially damaging lean fuel conditions. These injectors are designed as a direct replacement for factory top-feed fuel rails. The set includes four injectors, along with necessary o-rings and installation hardware. A critical aspect of these injectors is their characterized data, which is precisely measured for flow rates and spray patterns. This data is integrated into COBB's Accesstuner software, enabling professional tuners to create accurate and safe custom calibrations. It is essential to note that the COBB Tuning Top Feed 1050X Fuel Injectors REQUIRE a ProTuner custom calibration and are NOT compatible with Off-The-Shelf (OTS) maps designed for factory injector flow rates. Proper tuning is necessary to maintain stock idle characteristics and drivability.