On the underside of the left intake manifold (left-hand drive) two of the three hose ports are blocked. However how should they be blocked off? Is there a plug that goes directly into the manifold or should the barbed hose connectors be capped off?
I purchased two intake plugs thinking they are for this purpose but there is no way to fit them as far as I can see.
They are small solid aluminum discs probably 4mm thick.