Air delivery device for internal combustion engines

Air delivery device for internal combustion engines, comprising: - an air induction passage (2) for directing the passage of air towards at least one combustion chamber of said internal combustion engine, - a throttle valve assembly (5) having a throttle valve (11) operable between a first position wherein said throttle valve substantially closes said induction passage to the passage of air, and a second position wherein said throttle valve opens said air induction passage to the passage of air. The throttle valve (11) rotates about a rotation axis (18) lying outside the air induction passage (2).