Edelbrock part 2519 Performer Vortec V6 Marine Intake Manifold is based on the powerful Edelbrock 2111. This dual - plane intake is designed for the engine swap market utilizing 1985 and later Chevy 200 - 229 - 262 c.i.d. (3.8L and 4.3L) V6 engines with Vortec heads. With this Marine manifold, boaters can take advantage of the higher flow available with the Vortec head design. This marine intake has provisions for external water bypass and may be used on either Vortec blocks or 1995 and earlier blocks. Designed for use with Edelbrock Marine Series 600 cfm carb, it accepts late model water neck, alternator, HEI and air conditioning.