Edelbrock part #71164 Performer RPM Vortec intake manifold is Based on the powerful Edelbrock #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 Edelbrock 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 only. For street and marine engines operating from 1500-6500 RPM, see the Performer Vortec manifold or Performer Vortec EPS. Will not fit under stock Corvette hood. This manifold offers our long lasting bright chrome like EnduraShine finish that matches chrome and polished accessories.