Air Gap Intake Manifold for Big Block Chevy 396–502, Oval Port Dual Plane
Take your Big Block Chevy build to the next level with this Dual Plane Air Gap Intake Manifold, designed for compatible 396–502 cubic-inch Chevrolet Big Block V8 engines with oval port cylinder heads. Its performance-focused design helps manage intake temperatures while delivering strong throttle response, drivability, and consistent performance across a broad RPM range.
Constructed from durable aluminum with a polished finish, this intake manifold combines performance with a clean, high-end engine bay appearance. The 4-barrel square-bore flange is designed for 4150/4160-style carburetors, making it an excellent choice for street performance vehicles, classic muscle cars, hot rods, and custom BBC builds.
Key Features
- Dual plane air gap design
- Designed for 396–502 CID Big Block Chevy V8 engines
- Compatible with oval port cylinder heads
- Fits 396, 402, 427, 454, and 502 BBC applications
- Durable aluminum construction
- Polished aluminum finish
- 4-barrel square-bore carburetor flange
- Compatible with 4150/4160-style carburetors
- Helps reduce heat transfer into the intake
- Recommended RPM range: 1,500–6,500 RPM
- Ideal for street performance, muscle cars, classic Chevys, hot rods, and custom builds
Big Block Chevy Compatibility
Designed for compatible Chevrolet Big Block V8 engines:
- 396 CID
- 402 CID
- 427 CID
- 454 CID
- 502 CID
Important: This manifold is designed for oval port cylinder heads. Verify your cylinder-head port configuration before ordering.
Air Gap & Dual Plane Design
The air gap design helps reduce heat transfer from the engine to the intake manifold, helping maintain a cooler air/fuel charge. The dual plane configuration provides a balanced combination of throttle response, drivability, and performance across a broad operating range.
Carburetor Compatibility
Features a 4-barrel square-bore mounting flange designed for 4150/4160-style carburetors. Verify carburetor, throttle linkage, fuel-line, air-cleaner, distributor, and hood-clearance compatibility before installation.
Specifications
| Specification | Details |
|---|---|
| Material | Aluminum |
| Finish | Polished Aluminum |
| Engine Family | Big Block Chevy |
| Engine Size | 396–502 CID |
| Port Type | Oval Port |
| Design | Dual Plane Air Gap |
| Carburetor Flange | 4-Barrel Square Bore |
| Carburetor Compatibility | 4150/4160 Style |
| Recommended RPM | 1,500–6,500 RPM |
Ideal For
- Classic Chevy builds
- Muscle cars
- Street performance vehicles
- Hot rods
- Custom Big Block projects
- Carbureted BBC applications
Frequently Asked Questions
What engines does this intake manifold fit?
It is designed for compatible 396, 402, 427, 454, and 502 CID Big Block Chevy engines with oval port cylinder heads.
Is this intake for oval port or rectangular port heads?
It is designed specifically for oval port BBC cylinder heads.
What carburetors are compatible?
The 4-barrel square-bore flange is designed for 4150/4160-style carburetors.
What is the recommended RPM range?
The recommended operating range is 1,500–6,500 RPM.
Is this intake suitable for street use?
Yes. The dual plane air gap design makes it well suited for street performance, classic muscle cars, hot rods, and custom Big Block Chevy builds.
Will it fit my specific vehicle?
Fitment depends on your engine, cylinder-head configuration, carburetor, accessories, and available clearance. Always verify compatibility before ordering.
Have questions about fitment or compatibility? Contact us before ordering and we'll be happy to help.
Q: What finish does this intake manifold have?
A: It features a polished aluminum finish for a clean, high-performance appearance.
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.
