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Check your machine. I think you want an 80psi gauge to match your sender:
Oil Pressure Gauge: Datcon - Oil Pressure Gauge 0-80 PSI 24V – 101574, Datcon 06340-05 (Orange color).
This one: http://www.partdeal.com/datcon-oil-pressure-gauge-0-80-psi-24v-101574.html