The Performer Vortec is a dual-plane design that is tuned for maximum air flow from idle to 5500 rpm. Designed specifically for use on 1996-present Chevy 4.3L V6 Vortec engines in a marine application. One of the unique features is the brass lined water crossover and inserts to help protect the aluminum from salt-water corrosion and eliminate electrolysis in fresh water applications. It also features a carburetor flange that readily accepts square-bore and spread-bore carburetors. The Performer Vortec V6 Marine intake manifold is engineered to deliver maximum power and a broad torque curve for high-performance marine applications. Similar to the stock intake manifold, it includes a provision for 1/2" pipe water fittings on the front water crossover and 3/8" pipe horizontal vacuum fittings in the rear. Does not have a provision for an exhaust crossover, so an electric choke is required. Intended for marine use only and is not for street applications.

Installation Notes:

• Port exit dimensions: 2.05" tall w/ slanted side walls
• Manifold height: (A) 3.60" , (B) 4.44"
• Carb Pad Height: 4.02", Carb Angle: 3° 
• Recommended intake gasket - GM 89017866.
• Accepts square-bore and spread-bore carbs.

Carburetor Recommendations:

• Edelbrock Performer 600cfm Marine Carburetor - 350-1409 (for marine use only)

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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