Edelbrock 75811 RPM Air-Gap Intake Manifold Small Block Ford 351W Polished Aluminum

The Edelbrock 75811 RPM Air-Gap intake manifold is engineered for street and high-performance Ford 351W Small Block Windsor engines ranging from 351-427 cubic inches. This dual-plane, high-rise intake manifold incorporates race-winning Air-Gap technology that has proven its effectiveness on Edelbrock's Victor Series competition intakes for decades.

Air-Gap Design Technology:

The innovative Air-Gap design features an open air space that separates the intake runners from the hot engine oil in the lifter valley, resulting in a cooler, denser air/fuel charge for increased power output. This thermal isolation keeps intake temperatures lower throughout the entire RPM range, maximizing performance potential.

Key Features:

• Optimized for 1,500-6,500 RPM operating range—tuned 1,000 RPM higher than standard Performer Air-Gap manifolds
• Larger cross-sectional runner area and taller carburetor flange (5.75 inches) for compatibility with large-displacement and stroker 351W engines
• Dual-plane design with 180-degree firing order for excellent throttle response and top-end horsepower
• Square bore carburetor flange accepts single 4-barrel carburetors
• Includes bosses for nitrous oxide systems and rear water crossover
• Non-EGR design for maximum performance
• Stunning polished aluminum finish for a brilliant shine and classic appearance
• Manifold height: 5.31 inches (front), 6.19 inches (rear)
• Port exit dimensions: 1.07 x 1.88 inches
• Cast and machined in the USA at Edelbrock's state-of-the-art facilities

Installation Notes:

Requires 12-bolt intake gasket set (Edelbrock #7220 recommended). Use RTV silicone sealant for end seals—do not use end seal gaskets. Hardened washers must be used with intake bolts to ensure proper torque and prevent galling of the aluminum. Compatible with Ford automatic overdrive transmissions (AOD) when used with Lokar bracket SRK-4000.

This manifold is designed for uncontrolled (non-emissions controlled) vehicles or vehicles used solely for closed competition racing. Ideal for enthusiasts building high-performance street machines or race applications seeking substantial power gains with excellent drivability.