Perfect fit for Type 1 oil pressure relief screw Replaces the original M18 oil pressure relief screw Ideal for accurate oil temperature monitoring The SSP 300°F (150°C) Oil Temp Sending Unit is expertly designed to fit the Type 1 oil pressure relief plug, providing an excellent location for mounting. This unit effectively replaces the original M18 oil pressure relief screw, ensuring a seamless installation. With this sending unit, you can accurately monitor your engine's oil temperature, helping to maintain optimal performance and protect your engine from overheating. Enhance your vehicle's reliability and efficiency with this essential component. .