Edelbrock part #7516-CP RPM Air-Gap intake manifold is based on the powerful Performer RPM Vortec #7116. This single four-barrel intake is designed for 262-400 c.i.d. Chevy V8's with 1996 and later Vortec (L31) cast iron or Edelbrock E-Tec aluminum heads. The air-gap design features an open air space that separates the runners from the hot engine oil resulting in a cooler, denser charge for more power. An external water bypass boss i s machined into the front of the water crossover for use on 1996 and later Vortec production engines. Includes rear water outlets, nitrous bosses, a temp sensor boss that clears all waternecks, two distributor clamp locations and a heater outlet boss that's angled for proper fit over the valve cover. Accepts 1976 and later alternator and air-conditioning brackets for street installations. For square-bore carbs. The PN 7516-CP version comes with a brilliant Chrome plasma finish that is durable and easy to maintain. No provision for exhaust-heated chokes and no exhaust crossover. Will not fit under stock Corvette hood.