Holley EFI Intake Manifold Chev 350 Early Pattern # HO300-260Intake Manifolds, Fuel Injected, EFI, Multi port, Aluminum, Natural, Single plane, Plenum, 4150 Square Bore Mounting Flange, Chevy, Small Block, Each Fuel Injection Style: Multi port Basic Operating RPM Range: 2,500 7,500 Intake Section Included: Complete Engine Block Deck Height: Standard deck Injectors Included: No Multi Port Fuel Rails Included: Yes EGR: No Aftermarket Fuel Rail Required: Yes Throttle Body Included: No Supplemental Bosses Cast In: