hi guys, could anyone tell me where on the engine is the knock sensor???

also, does anyone know how much one of these suckers cost?

 

I'm doing this from memory so I might be a little off, but it's above the plugs on the rotor housing, the front rotor housing I think. You'll notice that on the other rotor housing, there's a tapped hole with nothing in it; the coorisponding hole on the other housing is a hex-head bolt, which is the knock sensor.

Hope it helps...