The Edelbrock Super Victor LS3 #28215 EFI intake manifold is designed for Gen IV LS engines equipped with LS3 cylinder heads, this new Super Victor intake manifold is ideal for anyone building a 700+ hp 4500 style EFI large displacement racing engine operating between 3,500 - 7,500 rpm. This new Super Victor intake manifold is designed with 24% larger runners than our Victor Jr. #28455 along with a larger 4500 style plenum. The large plenum makes this intake manifold ideal for nitrous and forced induction applications. The manifold also features tapered runners for increased flow at high rpm. The Super Victor 4500 series manifolds can accommodate bores up 2.25". The Edelbrock Super Victor LS3 #28215 EFI intake manifold include machined fuel injector bosses. A carburetor mounted style throttle bracket is recommended.