Aluminum Intake Manifold – LS Swap Carburetor Conversion, Cathedral Port

Upgrade your GM LS engine with this high-performance Aluminum Intake Manifold, designed to convert compatible LS-style engines from factory-style fuel injection to a 4-barrel carburetor or EFI throttle body setup. Featuring a polished aluminum finish and a mid-rise single-plane design, this LS swap intake manifold is ideal for classic cars, trucks, hot rods, muscle cars, and custom engine builds.

Designed specifically for GM LS engines with cathedral port cylinder heads, this manifold fits popular 4.8L, 5.3L, 5.7L, and 6.0L applications. The 4150/4160 square-bore flange provides compatibility with popular 4-barrel carburetors and compatible EFI throttle bodies.

The mid-rise single-plane intake design is engineered to provide efficient airflow and fuel distribution across the LS engine's operating range. Its polished aluminum construction also gives the engine bay a clean, performance-oriented appearance.

Key Features

• Aluminum Intake Manifold for GM LS-style engines

• Designed for LS swap and carburetor conversion applications

• Compatible with cathedral port LS cylinder heads

• Fits 4.8L, 5.3L, 5.7L, and 6.0L GM Chevy engines

• Mid-rise single-plane intake design

• Polished aluminum finish

• Converts compatible LS engines to 4-barrel carburetor or EFI throttle body

• Accepts 4150/4160 square-bore flange

• Supports throttle bores up to 1.750 inches in diameter

• Designed for performance airflow and fuel distribution

• Eight cast-in runner bosses for nitrous or fuel injector ports

• 0-degree carburetor flange angle

• 3/8-inch NPT vacuum port

• Includes mounting hardware and Viton O-ring gaskets

LS Engine Compatibility

This LS Aluminum Intake Manifold is designed for compatible GM LS-style engines with cathedral port cylinder heads, including:

• 4.8L LS

• 5.3L LS

• 5.7L LS

• 6.0L LS

Always verify your cylinder-head port configuration and engine application before ordering.

Carburetor & EFI Conversion

This LS Swap Intake Manifold provides a practical solution for converting a compatible LS engine to a carbureted setup. The 4150/4160 square-bore mounting flange accepts compatible 4-barrel carburetors and can also accommodate compatible EFI throttle-body applications.

This makes the manifold suitable for custom LS swaps where a traditional carburetor setup is preferred over the original electronic fuel-injection configuration.

Specifications

• Product Type: Aluminum Intake Manifold

• Engine Family: GM LS

• Port Style: Cathedral Port

• Design: Mid-Rise Single Plane

• Material: Aluminum

• Finish: Polished Aluminum

• Carburetor Flange: 4150/4160 Square Bore

• Maximum Throttle Bore: 1.750 inches

• Port Dimensions: 0.919 in. W × 2.700 in. H

• Carb Pad Height: 4.950 inches

• Carburetor Flange Angle: 0°

• Vacuum Port: 3/8 in. NPT

• Runner Bosses: 8

What's Included

• 6 × M6-1 × 88.91 UHL zinc-plated mounting bolts

• 4 × M6-1 × 64.65 UHL zinc-plated mounting bolts

• 10 × 6mm zinc-plated flat washers

• 1 × 3/8 in. NPT pipe plug

• 8 × Viton O-ring cylinder-head mounting flange gaskets

Why Choose This Aluminum Intake Manifold?

A properly matched Aluminum Intake Manifold can make an LS engine conversion significantly easier when building a custom carbureted or EFI performance setup. This mid-rise single-plane design combines LS cathedral-port compatibility with a conventional 4150/4160 square-bore flange.

The polished aluminum finish adds a classic performance appearance, while the integrated runner bosses provide additional flexibility for compatible fuel-injection or nitrous applications.

Whether you're building an LS-powered hot rod, classic truck, muscle car, street machine, or custom project, this LS Swap Intake Manifold provides a versatile foundation for a carburetor conversion or compatible EFI throttle-body setup.

Frequently Asked Questions

What engines does this Aluminum Intake Manifold fit?

It is designed for compatible 4.8L, 5.3L, 5.7L, and 6.0L GM LS-style engines with cathedral port cylinder heads.

Can this intake convert an LS engine to a carburetor?

Yes. The manifold is designed to convert compatible LS engines to a 4-barrel carburetor setup using a 4150/4160 square-bore flange.

Can it be used with EFI?

Yes. It can also be used with a compatible EFI throttle body, provided the throttle body matches the manifold's square-bore flange and dimensions.

Is this intake for cathedral port or rectangle port LS heads?

This Aluminum Intake Manifold is designed for cathedral port LS cylinder heads.

What carburetors does it accept?

The manifold features a 4150/4160 square-bore mounting flange for compatible 4-barrel carburetors.

What type of intake design is this?

It features a mid-rise single-plane design intended to provide efficient airflow and fuel distribution for performance applications.

Does the manifold include gaskets and hardware?

Yes. The package includes Viton O-ring cylinder-head mounting flange gaskets, mounting bolts, washers, and a 3/8-inch NPT pipe plug.

Is this intake manifold suitable for LS swaps?

Yes. It is specifically suited to compatible LS swap projects where a carbureted or EFI throttle-body configuration is desired.

What should I verify before ordering?

Confirm that your LS engine has cathedral port cylinder heads and that your carburetor or EFI throttle body is compatible with the 4150/4160 square-bore flange.