Breakdown of Included Items

Holley 300-277 Small Block Ford 4150 Intake Manifold Features:

• Engineered for Small Block Ford Engines with an original block deck height of 8.200 in. and standard head port openings and bolt hole locations.
• 2500-7500 RPM range makes it an excellent choice for Small Block Ford Engines including 347 ci. strokers for street performance.
• Isolated (air-gap) plenum with a square bore, single plane 4150 style flange with a height at the front of 5.580 in. and 6.400 in. at the rear.
• 1.820 in. height x 1.040 in. wide intake ports are cast with extra material to allow for porting to 2 in. height x 1.200 in. width.
• Threaded NPT (pipe) ports located under the carburetor flange in 1/8, 1/4, and 3/8 sizes.

Fitment Notes: 

• Does not fit 1980-1982 Ford 255 ci. engines.
• Early 289 ci. engines require thermostat housing w/counterbore 555-511310 for the thermostat.

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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