Air Gap Intake Manifold for Big Block Chevy 396–502 – Oval Port Dual Plane
Upgrade your Big Block Chevy engine with this polished aluminum Air Gap Intake Manifold, designed for Chevrolet BBC engines equipped with oval port cylinder heads. Featuring a dual plane air gap design, this performance intake manifold is engineered to help maintain a cooler air/fuel charge while providing strong, responsive performance across a broad RPM range.
This Air Gap Intake Manifold fits Big Block Chevy engines from 396 to 502 cubic inches, including popular 396, 402, 427, 454, and 502 BBC applications with compatible oval port cylinder heads. The dual plane configuration is well suited for street performance vehicles, muscle cars, classic Chevy builds, hot rods, and custom Big Block projects.
The polished aluminum finish provides a clean, high-performance appearance while complementing classic and modern engine bays. A 4-barrel square-bore mounting flange is designed to accept popular 4150/4160-style carburetors, making this intake a practical option for carbureted Big Block Chevy applications.
Key Features
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Air Gap Intake Manifold for Big Block Chevy engines
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Dual plane air gap design
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Designed for oval port cylinder heads
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Fits 396, 402, 427, 454, and 502 Big Block Chevy engines
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Polished aluminum construction and finish
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Helps maintain a cooler air/fuel charge
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4-barrel square-bore 4150/4160 mounting flange
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Recommended RPM range: 1,500–6,500 RPM
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Designed for street performance and custom BBC builds
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Suitable for muscle cars, classic Chevys, hot rods, and performance vehicles
Big Block Chevy Fitment
This BBC Air Gap Intake Manifold is designed for compatible Big Block Chevrolet engines, including:
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396 Big Block Chevy
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402 Big Block Chevy
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427 Big Block Chevy
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454 Big Block Chevy
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502 Big Block Chevy
Important: This intake manifold is designed for engines with compatible oval port cylinder heads. Verify your cylinder-head port configuration before ordering.
Dual Plane Air Gap Design
The dual plane air gap design separates the intake runners from the lifter valley, helping reduce heat transfer from the engine into the intake manifold. A cooler intake can help maintain a denser air/fuel charge, making this design popular for street-driven performance applications.
The dual plane configuration is also well suited to applications that require a balance of throttle response, drivability, and performance across a broad operating range.
Carburetor Compatibility
This Big Block Chevy intake manifold features a 4-barrel square-bore mounting flange designed for 4150/4160-style carburetors.
Always verify carburetor, linkage, fuel-line, air-cleaner, and hood-clearance requirements for your specific application.
Specifications
Material: Aluminum
Finish: Polished Aluminum
Engine Family: Big Block Chevy
Engine Sizes: 396–502 cubic inches
Port Type: Oval Port
Design: Dual Plane Air Gap
Carburetor Flange: 4-Barrel Square Bore
Carburetor Compatibility: 4150/4160 Style
Recommended RPM Range: 1,500–6,500 RPM
Why Choose This Air Gap Intake Manifold?
An Air Gap Intake Manifold is a popular choice for Big Block Chevy performance builds because the air gap design helps reduce heat transfer into the intake manifold while the dual plane configuration provides a versatile setup for street and performance applications.
For enthusiasts building a 396, 402, 427, 454, or 502 BBC engine with oval port heads, this polished aluminum intake manifold provides a combination of performance-focused design, carburetor compatibility, and classic engine-bay styling.
Frequently Asked Questions
Q: What engines does this Air Gap Intake Manifold fit?
A: It is designed for compatible Big Block Chevy 396, 402, 427, 454, and 502 cubic-inch engines with oval port cylinder heads.
Q: Is this intake manifold for oval port or rectangular port heads?
A: This Air Gap Intake Manifold is designed for oval port Big Block Chevy cylinder heads. It is not intended for rectangular port heads unless the appropriate compatibility is specifically confirmed.
Q: What type of intake manifold is this?
A: It is a dual plane Air Gap Intake Manifold designed for carbureted Big Block Chevy applications.
Q: What carburetors does it fit?
A: The 4-barrel square-bore mounting flange is designed for 4150/4160-style carburetors.
Q: What is the recommended RPM range?
A: The recommended operating range is approximately 1,500–6,500 RPM.
Q: What is the benefit of the air gap design?
A: The air gap design helps isolate the intake runners from engine heat, which can help maintain a cooler air/fuel charge.
Q: Is this suitable for a 454 Big Block Chevy?
A: Yes, it is designed for compatible 454 BBC engines with oval port cylinder heads.
Q: Is this intake manifold suitable for street use?
A: Yes. The dual plane air gap design makes it well suited to street performance vehicles, classic muscle cars, hot rods, and custom Big Block Chevy builds.
Q: What finish does this intake manifold have?
A: It features a polished aluminum finish for a clean, high-performance appearance.
Fitment Note
Big Block Chevy engines can use different cylinder-head port configurations. Before purchasing, verify your engine displacement, cylinder-head port type, carburetor configuration, intake mounting pattern, and available hood clearance to ensure proper fitment.
