Single Plane 4500 Carbureted Split-Design Race Intake Manifold GM LS1/LS2/LS6 Fits GM LS1/LS2/LS6 Carbureted with Cast Finish HolleyThe new Holley Single Plane Race intake manifold is designed with maximum performance in mind. Featured is a two piece split design that provides access for all levels of porting and modification. With shoulder bolt locators and O ring seal, disassembly & reassembly is simple and precise. The Ls Race single plane intake manifold is designed for hi performance racing engine applications, 5. 3 to 6. 2+ liter displacements, N A or with power adders. The