Single Plane Carbureted Intake GM LS3/L92 Carbureted Single Plane Intake Manifold Fits All GM LS Gen III or IV Engines Equipped with LS3/L92 Style Rectangular Port Cylinder Heads HolleyCarbureted single plane intake manifold. Fits all Gm Ls Gen Iii or Iv engines equipped with LS3 L92 style rectangular port cylinder heads Features and Benefits: Minimum carb flange height fit in vehicles with minimum hood modifications Weight 11. 5 lbs Port size 2. 50 inch height x 1. 15 inch wide 2500 7000 RPM power band Includes Viton O ring intake to cylinder head gaskets Viton is a registered trademark of DuPont Performance Elastomers 4150 Square