OEM Honda fuel injector resistor box for installing low impedance peak & hold injectors on a 4-cylinder Acura/Honda vehicle equipped with factory high impedance injectors. This is a required part to prevent the engine computer's injector drivers from burning out. Commonly used on custom turbocharged setups such as using 450cc DSM injectors. Includes pigtail plug for easy wiring, as pictured! Ships fast and free USPS 1st class with tracking within 1 business day of ordering!