Standard Ignition 2 Terminal Knock (Detonation) Sensor - KS539 Part #: KS539 Line: STD Standard Ignition 2 Terminal Knock (Detonation) Sensor 3 Year Limited Warranty Material: Metal, Plastic Terminal Type: Blade Terminal Gender: Male Attachment Method: Bolt-On, Direct-Fit Number Of Terminals: 2 Show More Show Less