Designed for competition 396-502 big-block Chevys. #2902 fits rectangular-port heads. These intakes are designed to optimize the flow characteristics of an 850 cfm standard flange carb. Features include extended runner dividers, smaller plenum chambers and unique runner design for better 60 foot times and max power from 3000 to 7500 rpm. These manifolds are especially suited to 502 c.i.d. and smaller competition engines. Testing has proven these manifolds superior to our competitors. Victor Jr. 454-R #2902 will fit Edelbrock Victor race heads #77609, #77659, Victor Jr. #60409 and Victor 24° #77409, #77459. Victor EFI also available with electronic fuel injector bosses, see Street & Competition EFI Manifolds.