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Holley

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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Estimated Ship Date: 11/30/2022
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Emissions

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

See Emissions Details
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

About Holley

Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley's products include carburetors, fuel pumps, fuel injection, intake manifolds, and much more. From start to finish, Holley has the parts to make your dream a reality.

Barrels4
Brand Holley
ConstructionCast
Emission Code3
EngineChevrolet Small Block Gen I
FinishSatin
Front Height4.18"
Fuel System TypeCarb
Manifold TypeHigh Rise
Product TypeManifold
Rear Height5.28"
RPM Power Band2500-7500 RPM
WarrantyLimited 90 Day
UPC090127052136
Part Number300-261
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) 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


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Modification to the valve covers may be required when this manifold is used with some types of cylinder heads.
Limited 90 Day: See Details
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Some parts are not legal for use in California or other states with similar regulations.