Holley 300-277 Single Plane 4150 Carbureted Intake Manifold Carbureted Single Plane Intake Manifold Small Block Ford 289-347

The intake manifolds are designed for use with 289-347 cubic inch Small Block Ford engines with a 8.2 inch deck height. The new single plane intake manifolds are designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM.

The carbureted manifold has a 4150 flange to work with all mechanical secondary square bore carburetors. These intake manifolds are designed to accept most stock hardware and accessory brackets, but offer performance features like better plenum and runner geometry for improved charge airflow.

The isolated design of the air/fuel passages helps to increase charge air density and performance.

Features and Benefits:

• Port size: 1.82 inch height, 1.04 inch width Extra material allows for porting to 2.00 inch height, 1.20 inch width 4150 square bore mounting flange Single plane design with isolated plenum for cooler charge air temperatures Accessory ports under the carburetor in 1/8 NPT, 1/4 NPT and 3/8 NPT sizes Power band: 2500-7500 RPM Height: front 5.58 inch, rear 6.40 inch

Details:

• Basic Operating RPM Range: 2500-7500 RPM
• Cnc Ported: No
• Carburetor Flange: 4150 Square Bore
• Carburetor Quantity: 1.0
• Carburetor Studs Included: No
• Color: Natural
• Construction: Cast
• Cylinder Head Port Shape: Rectangle
• Deck Height: 8.2 Inch
• EGR Port: No
• Engine: Ford Small Block
• Flange Style: 4150 Square Bore
• Fuel Injectors Included: No
• Fuel Rail(s) Included: No
• Fuel System Type: Carbureted
• Gasket Or Seal Included: No
• Grade Type: Performance
• Intake Port Gasket(s) Included: No
• Manifold Type: Single Plane
• Material: Aluminum
• Nitrous Bung(s) Included: No
• Plenum Finish: Natural
• Removable Runners: No
• Removable Top/Lid: No
• Single Or Dual Plane Type: Single Plane
• Throttle Body Bore Diameter: 3.6
• Throttle Body Gasket Included: No
• Throttle Body Included: No
• Vacuum Ports: Yes

Installation Guide: Download PDF

Installation / Product Video: Watch on YouTube

⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.