EFI Engine Knock Sensor mounting stud

EFI Engine Knock Sensor mounting stud. (1/4" NPT & 5/16-18 with flange style nyloc sensor retaining nut)

Fits in engine water jacket drain hole to mount to piezo style single wire knock sensor. Fits various marine engines and automotive aftermarket crate engine applications. 

Component is as pictured and does NOT come with a knock sensor.