Patent ID: 6880526

Claim:
An intake system for an internal combustion engine comprising: at least two intake valves; a passage through which a mixture of gas is supplied to each of said intake valves; a passage separating partition wall provided in said passage for supplying each said mixture of gas, respectively, to each of said intake valves; an intake port opening into which said mixture of gas is taken in so as to supply said mixture of gas into said passage; and a partition wall for bisecting said intake port opening, said partition wall being mounted in said intake port opening oppositely to said passage partition wall for supplying each said mixture of gas, respectively, to each of said intake valves, in such a manner as to be replaceable with another partition wall; a groove formed in an inner wall surface of said passage for receiving said partition wall, said groove being disposed at a predetermined disposition relative to said passage separating partition wall, there being a space between an edge of the partition wall and an edge of the passage separating partition wall.