The perfection of a vacuum injection system much depends on the inlet manifold. A vacuum leakage in the inlet manifold is often caused by worn throttle spindels and butterflies. This results in the mal-function of the Metering Unit's supply of petrol to the injectors, causing extreme fuel consumption. All parts of our inlet manifolds are manufactured under our supervision and are especially made for each individual manifold and are partly hand-made! Much care is given to each hand-reassembled manifold. Vacuum leakages now belong to the past.