For competition 361-383-400 engines, the Victor 383 has an all new runner design that delivers big power from 3500 to 7500 rpm. This single-plane intake manifold includes nitrous bosses and is drilled for both square-bore and Thermo-Quad carbs, with enough material for conversion to a Thermo-Quad carb for Super Stock applications. Match this race winning manifold with Edelbrock Performer RPM heads for maximum performance.