Holley Performance 300-261 Engine Intake Manifold
Holley Performance 300-261 Engine Intake Manifold
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Holley

Holley Performance 300-261 Engine Intake Manifold

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Key item features

  • Engine Compatibility: Designed for 1957-1986 262ci-400ci and 1987-later Chevy Small Block V8 engines with aluminum heads, including 1987-91 L98 aluminum Corvette cylinder heads (non-EGR).
  • Performance Range: Offers a broad RPM powerband for high-performance street/strip applications, with an optimal power band between 2500-7500 RPM.
  • Carburetor Fitment: Features a square bore carburetor mounting flange, compatible with all stock or aftermarket square-bore carburetors, including those with manual or electric chokes.
  • Design Features: Incorporates a single plane with an isolated plenum and an isolated water cross-over, enhancing charge air density and overall performance.
  • Physical Dimensions: Measures 4.18" in height at the front and 5.28" at the rear, with port dimensions of 1.92" height and 1.20" width.
  • Installation Flexibility: Designed to accept most stock hardware and accessory brackets, and includes a choice of two distributor clamp locations for versatile setup.
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Showing 1-2 of 2 reviews

Dec 20, 2018
Soupership
5 out of 5 stars review

thermostat location.

the thermostat housing is located in the factory position on the holly manifold. this will be important if your using a set of valve covers with a cross over vent tubes. all other manifolds for an application like this have moved the housing all the way forward of the intake making it impossible to use the cross over tube. this intake will work with the cross over vent tube.

Review from jegs.com
Helpful?7I2TFGET04P0910561515
Mar 12, 2020
68 Bowtie
5 out of 5 stars review

Quality piece.

Installed this manifold on 406 sbc that had a dual plane with a throttle body EFI. Huge improvement! EFI systems are much easier to tune with single plane intake. Idle and low rpm response are not compromised because EFI does not rely on manifold vacuum.

Review from jegs.com
Helpful?7I2TFGET04P0910561515