7116 Performer RPM Intake Manifold Fits for Small Block Chevy Vortec Dual Plane 1500-6500 RPM 45055232Description: #7116 Performer RPM Vortec intake manifold is Based on the powerful #7101, this single four barrel intake is designed for the street rod, marine and engine swap market utilizing 262 400 c. i. d. Chevy V8's with 1996 and later Vortec (L31) cast iron or E Tec aluminum heads. An external water bypass boss is machined into the front of the water crossover for use on 1996 and later Vortec production engines. Manifold accepts square bore carbs