Holley EFI 2x4 Dual Plane Intake Manifold. All GM LS Gen III or Gen IV engines equipped with LS3/L92 style rectangular port cylinder heads.. The Holley GM 2x4 dual plane manifold is designed in the tradition of the great dual Holley 4160 induction systems that competed on drag strips, in Trans-Am at Lemans in the 1960's. The technology of the LS pushrod engine is now mated with the impressive multi-carb looks and performance of the muscle car era!. The LS engine architecture does not utilize an intake mounted water neck or distributor._x000D_ _x000D_ NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors.
