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

• Fits LS1, LS6, LS2, 5.3L & 6.0L cathedral-port engines

• Dual-plane design for strong street performance

• Converts LS engines to carbureted operation

• Polished aluminum performance construction

Upgrade your LS-powered build with the Top Street Performance GM LS Cathedral-Port Carbureted Dual Plane Aluminum Intake Manifold. Designed for Chevrolet LS cathedral-port engines, this polished aluminum intake manifold provides a simple and effective solution for LS carburetor conversions, street performance builds, muscle cars, hot rods, and custom LS swap projects.

Engineered with a dual-plane runner design, this LS carbureted intake manifold is optimized to deliver strong throttle response, excellent drivability, and balanced power throughout the 1500-6500RPM operating range. The dual-plane configuration helps improve low- and mid-range performance, making it an excellent choice for street-driven vehicles and performance applications seeking broad power delivery.

Constructed from lightweight aluminum with a polished finish, this intake manifold provides durability, corrosion resistance, and a clean performance appearance. The 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 LS1, LS6, LS2, LM7, L59, LM4, L33, LH6, LC9, LH8, LQ4, LQ9, L98, and compatible cathedral-port LY6 and L76 applications, this intake manifold is ideal for classic muscle cars, street rods, hot rods, trucks, and custom LS swap projects.

Whether you're performing an LS1 carb conversion, upgrading a 5.3 LS truck, or installing a carbureted LS engine into a classic muscle car, this polished dual-plane intake manifold delivers the drivability, simplicity, and performance enthusiasts demand.

Dual Plane Intake Manifold Technology
The Top Street Performance LS Cathedral-Port Carbureted Dual Plane Intake Manifold is engineered for enthusiasts looking to convert modern LS engines to a traditional carbureted induction system. The dual-plane design separates intake runners to help improve mixture distribution and street-friendly performance while maintaining excellent drivability.

Performance Benefits
The dual-plane runner design promotes efficient airflow distribution, helping improve throttle response, torque production, and overall engine performance. Its design makes it an ideal choice for cruising, weekend performance vehicles, street rods, hot rods, and classic muscle car LS swap projects.

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, LY6*, L76*)
* Cathedral-port applications only.

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
• Dual-plane intake manifold design
• Square-bore 4-barrel carburetor flange
• Verify carburetor, ignition, fuel system, and hood clearance compatibility before installation
• Not compatible with LS3, L92, L99, LS7, LS9, LSA, or Gen V LT cylinder heads

SPECIFICATIONS:
Basic Operating RPM Range: 1,500-6,500 RPM
Carburetor Flange Style: 4150 Square Bore
Carburetor Quantity: 1
Color: Polished
Deck Height: Standard
EGR Port: No
Front Maximum Height: 5.070 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: 6.140 in.
Single Or Dual Plane Type: Dual Plane

What engines is this intake manifold designed for?
This intake manifold fits Chevrolet LS cathedral-port engines including LS1, LS6, LS2, LM7, LC9, LQ4, LQ9, and other compatible cathedral-port applications.

Will this intake manifold fit an LS1 engine?
Yes. LS1 applications are specifically listed in the published fitment.

Will this intake manifold fit an LS6 engine?
Yes. LS6 applications are specifically listed in the published fitment.

Will this intake manifold fit an LS2 engine?
Yes. LS2 cathedral-port applications are supported.

Will this intake manifold fit a 5.3 LS engine?
Yes. Supported 5.3L applications include LM7, L59, LM4, L33, LH6, LC9, and LH8 engines.

Will this intake manifold fit a 6.0 LS engine?
Yes. Supported cathedral-port 6.0L applications include LQ4, LQ9, L98, LS2, LY6, and L76 engines.

What is the advantage of a dual-plane intake manifold?
A dual-plane intake manifold helps improve low-end torque, throttle response, drivability, and broad power delivery, making it ideal for street-driven performance vehicles.

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 LS engine from EFI to a carburetor with this intake?
Yes. This intake manifold is designed to support carbureted conversions on compatible cathedral-port LS engines.

Will this intake fit LS3 heads?
No. LS3, L92, L99, LS7, LS9, LSA, and Gen V LT cylinder heads are not compatible.