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Holley Single Plane Intake Manifold- Chevy Small Block V8

Intake Manifold 1957-1986 262ci-400ci, 1987-later with Aluminum Heads

PART# 300-261

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Modification to the valve covers may be required when this manifold is used with some types of cylinder heads.

Overview

The new single plane intake manifold is designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM. The carburetor-mounting pad is designed to accept all stock or aftermarket square-bore carburetors with manual or electric chokes. These intake manifolds are designed to accept most stock hardware and accessory brackets, but offer performance features; like an updated plenum divider area, a 1" shorter height than the 300-25 manifold, and a choice of two distributor clamp locations. The isolated design of the air/fuel passages helps to increase charge air density and performance. The 300-261 intake manifolds are designed for square-bore carburetor applications on 1957-86 262-400cid Small Block Chevrolet engines and SBC engines equipped with 1987-91 L98 aluminum Corvette cylinder heads (non-EGR applications). Also, these manifolds will work with any SBC engine equipped with aftermarket cylinder heads, as long as they have a standard port flange opening and mounting bolt locations.

Features:

  • Single Plane with Isolated Plenum
  • Square Bore Carburetor Mounting Flange
  • Isolated Water cross-over
  • Power band: 2500-7500 RPM
  • Height: Front 4.18", Rear 5.28"
  • Port Size: 1.92” height 1.20" width

Specs

Barrels4
BrandHolley
ConstructionCast
Emission Code3
EngineChevy Small Block V8
FinishSatin
Front Height4.18"
Fuel System TypeCarb
Manifold TypeHigh Rise
Product TypeManifold
Rear Height5.28"
RPM Power Band2500-7500 RPM
Part Number300-261

Emissions

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

Tech Resources

Modification to the valve covers may be required when this manifold is used with some types of cylinder heads.
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      Some parts are not legal for use in California or other states with similar regulations.

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