Abstract: A propane supply unit for use with gasoline powered automotive internal combustion engines to replace the liquid fuel. The unit consists of a plurality of circular or otherwise formed tubular elements supplied with gas from a common manifold located within the air cleaner housing. The tubular elements are spaced so as to divide up the air flow. Openings in the elements are located as to face the spaces between the elements and discharge the gaseous fuel into the separate streams of air. The unit does not alter the normal air flow conditions so that no modification of the existing engine control system is required when the supply unit is used.