just puttin my engine back in now and comparing to my mates rst wev found where all the plugs go except a grey one and a green one. The green one is supposed to go on the side of the manifold, or it does on me mates, but theres no plug on the side of manifold!!!

What are these plugs for and can i run without them?

cheers

 

green one is knock sensor, on the side of the inlet, some people dont run them as they cause problems, depends on what ecu u run

never seen a grey one?