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

Upgrade your LS-powered build with the Top Street Performance GM LS Cathedral-Port Carbureted Single Plane Aluminum Intake Manifold. Designed for Chevrolet LS cathedral-port engines, this polished aluminum intake manifold provides a straightforward solution for LS carburetor conversions, performance street vehicles, 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 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 cathedral-port engines including LR4, LY2, LM7, L59, LM4, L33, LH6, LC9, LH8, LS1, LS6, LQ4, LQ9, L98, and LS2 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 LS1 carb conversion 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 Cathedral-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 CATHEDRAL-PORT ENGINES
• 4.8L / 293 in³ (LR4, LY2)
• 5.3L / 325 in³ (LM7, L59, LM4, L33, LH6, LC9, LH8)
• 5.7L / 346 in³ (LS1, LS6)
• 6.0L / 364 in³ (LQ4, LQ9, L98, LS2)

COMMON VEHICLE APPLICATIONS
• Chevrolet Silverado
• GMC Sierra
• Chevrolet Camaro
• Chevrolet Corvette
• Chevrolet Tahoe
• Chevrolet Suburban
• GMC Yukon
• Chevrolet Avalanche
• Escalade
• Pontiac GTO

NOTES
• Fits Chevrolet LS cathedral-port engines only
• Designed for carbureted fuel systems
• Single-plane intake manifold design
• 4150 square-bore carburetor flange
• Supports the published 2,500-7,000 RPM operating range
• Verify carburetor, ignition, fuel system, distributor, and hood clearance compatibility before installation
• Not compatible with LS3, L92, L99, L94, L9H, L76, LY6, L96, LS7, LS9, LSA, or Gen V LT 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: Cathedral
Material: Aluminum
Mounting Hole Quantity: 10
Rear Maximum Height: 5.417 in.
Single Or Dual Plane Type: Single Plane