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Air and Fuel› Carburetors and Components

Holley

650 CFM Square Bore Carburetor

Name: 650 CFM Square Bore Carburetor
Brand: Holley
SKU: ND4227

$426.75

SKU: ND4227

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Description

The Holley ND4227 is a high-performance, 4-barrel carburetor built on the robust 4150 series platform. This unit offers a substantial 650 CFM (Cubic Feet per Minute) airflow capacity, making it suitable for a wide range of performance applications, from street machines to dedicated race vehicles. Its square bore design and mechanical secondary operation provide precise throttle response. The 4150 series is a well-established design from Holley, recognized for its reliability and tunability. The ND4227 specifically omits a choke, simplifying its design and making it ideal for applications where cold-start enrichment is handled by other means or in warmer climates. While the specific fitment for the ND4227 is noted for Chevrolet vehicles from 1963-1965 with 396-427 cubic inch engines, Holley carburetors are often adapted to various V8 applications. It is crucial to verify compatibility with your specific intake manifold and engine build to ensure optimal performance and fit.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Holley
Part Number	ND4227
Category	Air and Fuel

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

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