Intake system for internal combustion engine

An intake system for an internal combustion engine having a cylinder head defining in part a variable volume chamber, an inlet port extending from an inlet opening in one side of said cylinder head and serving said chamber, a first intake passage affixed to said one side of said cylinder head and serving said inlet port opening, said first intake passage extending outwardly of said one side of said cylinder head and forming an extension of said inlet port, a second intake passage serving said inlet port, said second intake passage having a first U shaped section communicating at one end with said first intake passage and communicating at its other end with a generally straight section extending across said cylinder head and terminating at an opposite side of said cylinder head, said second intake passage having a substantially greater length than said first intake passage, throttle valve means for selectively controlling the flow through said intake passages, and a common inlet device for supplying air to both of said intake passages.