Edelbrock Part # 71163 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 a durable black power coated finish for long lasting protection and a distinctive look.