AIR FLOW RESEARCH 4831 Air Flow Research 4831 SBF 289/302 Dual-Plane Square-Bore 4150 Intake Manifold

The Air Flow Research 4831 intake manifold is designed for Small Block Ford 289 and 302 engines requiring a square-bore, dual-plane intake configuration. Manufactured from aluminum with a natural finish, this manifold provides a practical foundation for street, performance, and restoration applications where fitment and reliable airflow are important. Its 4150-style square-bore layout is compatible with carbureted systems using the corresponding mounting pattern.
The dual-plane design separates the intake runners into two paths, helping maintain strong intake signal and balanced cylinder filling across the engine’s operating range. This configuration is well suited to drivers and builders seeking responsive throttle behavior, dependable low- and mid-range performance, and a versatile manifold for a traditional Small Block Ford combination. The aluminum construction also helps reduce weight compared with many cast-iron alternatives while providing a durable base for long-term use.
Air Flow Research part number 4831 is supplied with a natural aluminum finish that can be installed as-is or customized to complement the rest of the engine compartment. Before installation, verify engine configuration, cylinder-head compatibility, carburetor mounting requirements, hood clearance, linkage routing, and accessory placement. Professional installation and proper tuning are recommended to ensure correct sealing, fuel distribution, and engine performance. This intake manifold is sold individually and is intended for Small Block Ford 289/302 applications using a compatible 4150 square-bore carburetor.

Features:

• Application: Designed for Small Block Ford 289 and 302 engines

• Manifold Design: Dual-plane configuration for balanced intake runner distribution

• Carburetor Pattern: 4150-style square-bore mounting layout

• Construction: Aluminum body for durable performance and reduced weight

• Finish: Natural aluminum appearance suitable for installation or customization

• Brand: Air Flow Research

• Part Number: 4831