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Classic Instruments engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Classic Instruments lineup with fast shipping and expert fitment support — order with confidence.
Ensure your vehicle's instrumentation is accurate with the Classic Instruments SN74Z Speedometer/Tach Calibrator. This high-quality signal interface is designed to solve common calibration issues when changing tire sizes, gear ratios, or transmission types. Whether you are performing a modern engine swap or upgrading your drivetrain, this unit provides the necessary signal conditioning to keep your gauges reading true.
The SN74Z is an essential tool for any enthusiast looking to maintain factory-level accuracy after performance modifications. By intercepting the pulse signal, it allows for fine-tuning via an easy-to-use interface, ensuring your speedometer and tachometer reflect your actual vehicle speed and engine RPM. This unit is compatible with most electronic speedometers and tachometers on the market today. Trust GGCRACING for all your precision instrumentation needs.
Other popular Classic Instruments products customers consider together:
Classic Instruments engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Classic Instruments lineup with fast shipping and expert fitment support — order with confidence.
Ensure your vehicle's instrumentation is accurate with the Classic Instruments SN74Z Speedometer/Tach Calibrator. This high-quality signal interface is designed to solve common calibration issues when changing tire sizes, gear ratios, or transmission types. Whether you are performing a modern engine swap or upgrading your drivetrain, this unit provides the necessary signal conditioning to keep your gauges reading true.
The SN74Z is an essential tool for any enthusiast looking to maintain factory-level accuracy after performance modifications. By intercepting the pulse signal, it allows for fine-tuning via an easy-to-use interface, ensuring your speedometer and tachometer reflect your actual vehicle speed and engine RPM. This unit is compatible with most electronic speedometers and tachometers on the market today. Trust GGCRACING for all your precision instrumentation needs.
Other popular Classic Instruments products customers consider together:
