Sierra Complete Audible Warning Kit PressureTemp The Sierra Audible Warning Kit has a buzzer that alerts the operator of high engine temperatures or low engine oil pressure. The kit includes instructions, an oil pressure switch set at 6 PSI, and a temperature switch set at 200 F. Kit Contains 1 OP22900 Oil Pressure Switch 1 TS25101 Temperature Switch 1 MC33501 Buzzer Interchangeable with Cole-Hersee M40177BP California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Det