GM LS Rectangle Port Carbureted Single Plane Aluminum Intake Manifold - Polished

• Fits LS3, L92, L99, L9H, L94, LY6, L76 & L96 engines

• Single-plane design supports performance airflow

• Converts LS engines to carbureted operation

• Polished aluminum performance construction

Convert your LS-powered build to a traditional carbureted induction system with the Top Street Performance GM LS Rectangle-Port Carbureted Single Plane Aluminum Intake Manifold. Designed for Chevrolet LS rectangle-port engines, this polished aluminum intake manifold provides a straightforward solution for LS carburetor conversions, performance builds, hot rods, muscle cars, and custom LS swap projects.

Engineered with a single-plane runner design, this LS carbureted intake manifold is optimized to support increased airflow demand while maintaining excellent performance throughout the 2,500-7,000 RPM operating range. The open-plenum design promotes efficient airflow distribution, making it an excellent choice for naturally aspirated and power-adder combinations seeking improved induction performance.

Constructed from lightweight aluminum with a polished finish, this intake manifold provides durability, corrosion resistance, and a clean performance appearance. The 4150 square-bore carburetor flange supports popular 4-barrel carburetor configurations while allowing builders to eliminate factory EFI components and simplify engine management requirements.

Designed to fit Chevrolet LS rectangle-port engines including LY6, L76, L96, LS3, L92, L99, L9H, and L94 applications, this intake manifold is ideal for muscle cars, street rods, trucks, SUVs, race vehicles, and custom LS conversion projects.

Whether you're performing an LS3 carb conversion, upgrading a Silverado HD LY6 build, converting an L94-powered SUV, or installing a carbureted LS engine into a classic muscle car, this polished single-plane intake manifold delivers the airflow capacity, simplicity, and performance enthusiasts demand.

Single Plane Intake Manifold Technology
The Top Street Performance LS Rectangle-Port Carbureted Single Plane Intake Manifold is engineered for enthusiasts looking to convert modern LS engines to a traditional carbureted induction system. The single-plane design utilizes a common plenum layout that promotes increased airflow and performance potential while maintaining compatibility with popular 4150-style carburetors.

Performance Benefits
Designed to operate throughout the 2,500-7,000 RPM range, this single-plane intake manifold supports increased airflow demand and strong performance characteristics for street performance vehicles, hot rods, muscle cars, race applications, and LS-powered builds. The open-plenum design makes it an excellent choice for enthusiasts seeking a performance-focused carbureted induction system.

COMPATIBLE WITH
CHEVROLET LS RECTANGLE-PORT ENGINES
• 6.0L / 364 in³ (LY6, L76, L96)
• 6.2L / 376 in³ (LS3, L92, L99, L9H, L94)

COMMON VEHICLE APPLICATIONS
Chevrolet Silverado
GMC Sierra
Chevrolet Camaro
Chevrolet Corvette
Chevrolet Tahoe
CTS-V

NOTES
• Fits Chevrolet LS rectangle-port engines only
• Designed for carbureted fuel systems
• Single-plane intake manifold design
• 4150 square-bore carburetor flange
• Verify carburetor, ignition, fuel system, distributor, and hood clearance compatibility before installation
• Not compatible with LS1, LS6, LS2, LR4, LM7, LQ4, LQ9, or other cathedral-port cylinder heads

SPECIFICATIONS
Basic Operating RPM Range: 2,500-7,000 RPM
Carburetor Flange Style: 4150 Square Bore
Carburetor Quantity: 1
Center Maximum Height: 5.417 in.
Color: Polished
Deck Height: Standard
EGR Port: No
Front Maximum Height: 5.417 in.
Fuel System Type: Carbureted
Gasket Or Seal Included: Yes
Grade Type: Performance
Intake Port Shape: Rectangle
Material: Aluminum
Mounting Hole Quantity: 10
Rear Maximum Height: 5.417 in.
Single Or Dual Plane Type: Single Plane

What engines is this intake manifold designed for?
This intake manifold fits Chevrolet LS rectangle-port engines including LY6, L76, L96, LS3, L92, L99, L9H, and L94 applications.

Will this intake manifold fit an LS3 engine?
Yes. LS3 applications are specifically listed in the published fitment.

Will this intake manifold fit an L92 engine?
Yes. L92 rectangle-port applications are supported.

Will this intake manifold fit an L99 engine?
Yes. L99 rectangle-port applications are supported.

Will this intake manifold fit an L94 engine?
Yes. L94 applications are specifically listed in the published fitment.

Will this intake manifold fit an L96 engine?
Yes. L96 applications are specifically listed in the published fitment.

What is the advantage of a single-plane intake manifold?
A single-plane intake manifold uses a common plenum design that helps support increased airflow demand and performance-oriented engine combinations.

What RPM range is this intake manifold designed for?
This intake manifold is designed to operate throughout the manufacturer's published 1,500-6,500 RPM range.

Is this intake manifold designed for carbureted applications?
Yes. This intake manifold is specifically designed for carbureted LS engine conversions.

Can I convert my LS3 from EFI to a carburetor with this intake?
Yes. This intake manifold is designed to support carbureted conversions on compatible rectangle-port LS engines.

Will this intake fit LS1 or LS6 cylinder heads?
No. LS1 and LS6 engines use cathedral-port cylinder heads and are not compatible with this intake manifold.