i did a small search for this and didnt find something that was stright to the point. and i hope i am not an idiot and this question is stright forward. what is the purpose of the knock box in the 87-88s? do i really need one. i have seen a few forums that say they are useless..

 

Google knock sensor.

 

ok so that is what i thought it was maybe i should have searched for sensor and now knock box... i feel like a DA now