Includes mounting brackets, hardware, and wiring harness All-electric Classic Instruments' Zeus Speedometer Technology is built-in meaning the cluster requires no external control boxes and works directly with ECM or VSS signals Push-button speedometer calibration * Bezel, diffuser, and lens not included. Use your original bezel, diffuser, and lens Installs with original bezel, diffuser, and lens Built-in ECM signal filter switch The 1966 - 1967 GTO Package Series installed, features a 3 3/8" Speedometer, Tachometer. Features include: LS sending unit kit included, fuel gauge is calibrated to 0-90 ohm Green LED turn signal indicators, Blue high beam indicator, in-dash housing (single turn signal for 64-65. Double turn single for 66-67)