An air intake apparatus for supplying air to an internal combustion engine comprises
a hollow plastics material enclosure, an air filter and an air compressor which
when activated compresses air supplied to the engine. The enclosure houses the
air filter and compressor. An engine air supply path through the enclosure passes
from an air inlet to the enclosure to an air outlet from the enclosure via the
air filter. The enclosure inlet and enclosure outlet define respectively an upstream
end of the air supply path and a downstream end of the air supply path, wherein
the compressor is secured within the enclosure by resilient vibration-isolating mounts.