LS Carbureted Manifold 2x4 Dual Plane LS3/L92 Carbureted GM LS Gen III LS3/LS92 2x4160 Dual Plane Intake Manifold All GM LS Gen III or Gen IV Engines Equipped with LS3/L92 Style Rectangular Port Cylinder Heads HolleyThe 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! Features and Benefits: Perfect for any street performance, muscle car or street rod enthusiast Fits all Gm Ls Gen Iii or Gen Iv engines equipped