Item Feature:The nozzle features efficient fuel injection and high impedance coils for good performance.The fuel injector comes with durable effective rubber O-Ring that can seal fuel vapors in and keep them from leaking.The high impedance fuel injector has been tested and exactly matches the internal coil resistance and fuel flow rate of OEM fuel injector.Direct replacement of your old injector and no modification needed.Professional installation is highly recommended. We also suggest that you inspect the other components of the engine prior to installation and tune the engine after installation.