Saturated / High Impedance Injectors. Largest high impedance injector ever! Utilizing the latest injector technology and featuring state of the art matching with Data Match Technology. Great injector for E85 applications! These injectors do not require a resistor pack or P&H drivers. Includes pigtails PGT DEN4 or add Plug & Play adaptors PADPDtoJ4. DO NOT USE WITH VP Import, Q16 or OTHER MTBE OXYGENATED FUELS. Resistor pack removal recommended.