Intake system for automotive engine

An induction system for an internal combustion engine having a pair of angularly disposed cylinder banks each formed with at least one cylinder bore, a pair of cylinder heads each affixed to a respective one of said cylinder banks and closing the cylinder bore thereof, a pair of plenum chambers each lying generally vertically above a respective one of said cylinder heads, intake passages formed in said cylinder heads for supplying each cylinder bore thereof with an intake charge, a series of first intake runners extending from each of said plenum chambers to the intake passages of the adjacent cylinder head, a series of second intake runners extending from each of said plenum chambers to the intake passages of the remotely positioned cylinder head, said first intake runners being substantially shorter than said second intake runners, said first and said second intake runners being arranged in pairs with each of said pairs comprising a first and second runner merging together externally of said plenum chambers to form a common passage and opening communicating with a respective one of said intake passages.