Delphi AS10092 Knock Sensor Calibrated for a wide variety of frequencies to detect shifts, an adjust to provide accurate signals to help maximize engine performance Self-generating piezoelectric design requires no power to the sensor Flat frequency response allows the same senor to be used on different engines and the sensor responds to knock frequencies higher than the primary frequency Ground-isolated design with two-wire shielded harness helps protect the sensor signal from electro-magnetic interference (EMI) Large mounting hole accommodates mounting bolts up to 10 millimeters in diameter