These manifolds are designed for Gen IV LS engines equipped with LS7 cylinder heads or Edelbrock Pro-Port Victor Jr. cylinder heads. These manifolds are .75 taller than our LS3 Super Victor intakes. The new Super Victor intake manifold #2887 is capable of airflow demands of 750+ hp on naturally aspirated engines. The larger plenum version #2890 for 4500 Series carburetors has an increased intake runner area and is capable of 800+ hp operating in the 3,500-8,000 rpm range. Super Victor #28905 and #28875 include machined fuel injector bosses. A carburetor mounted style throttle bracket is recommended.