All injectors are serviced as stated below: OHM Tested for electrical shorts Disassembled and externally cleaned Checked for any major cosmetic damage Internally cleaned via numerous ultrasonic baths using special non-hazardous solutions. Back-flushed to remove any internal debris (multi-step process) Pressure/Leak tested, Spray/Flow Tested Flow matched using the very latest in fuel injection calibrating technology Carefully packaged to ensure safe arrival .