Knock sensor

[ozzy smith]

So if I buy the used one from sho source is that two that come with it? Or I have too buy two sets .

http://www.shosource.com/catalog/product_info.php?cPath=77&products_id=467

 

[LOUDSHO92]

The rear is here: http://www.shosource.com/catalog/product_info.php?cPath=77&products_id=457

 

[ozzy smith]

So does two ? the noise is only coming from the front valve cover.