Edelbrock part #2516 Performer RPM Vortec marine intake manifold is based on the powerful Edelbrock #7101. This single four-barrel intake is designed for, marine engines utilizing 262-400 c.i.d. Chevy V8's with 1996 and later Vortec (L31) cast iron or Edelbrock E-Tec aluminum heads. The Edelbrock Performer RPM #2516 marine intake manifold features brass lined front water crossover and brass flange inserts to cover the rear water openings. An external water bypass boss is machined into the front of the water crossover for use on 1996 and later Vortec production engines.