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

• GM LS Series dual plane intake is built for carbureted systems with 4150 Square Bore carburetor flange compatibility.

• Operating range: 1,500-6,500 RPM. Deck height: Standard. Designed to match the camshaft, cylinder heads, and vehicle use.

• Aluminum construction with polished finish supports durability, sealing, and clean engine-bay presentation.

• Front/center/rear height: 5.070 in., 6.140 in. Mounting holes: 10. Verify hood clearance, distributor clearance, gasket alignment, and accessory spacing.

This intake manifold is engineered for GM LS Series applications and helps support consistent airflow, clean fuel distribution, and dependable street performance operation across a wide range of compatible builds.

Airflow & Performance Design
The intake runner and plenum design help support balanced airflow delivery between cylinders while maintaining stable throttle response and dependable street-driven performance.

Construction & Engine-Bay Fitment
The manifold construction to support long-term durability, heat management, and a clean installed appearance in demanding engine-bay environments.

Installation Considerations
Proper installation requires confirming cylinder head compatibility, intake gasket alignment, carburetor or throttle-body configuration, distributor clearance, and hood clearance before final assembly.

System Matching
Verify fuel system compatibility, throttle linkage setup, vacuum routing, sensor provisions, and accessory clearance before installation. This intake manifold is intended for properly matched engine combinations.

What engines is this intake manifold compatible with?
This intake manifold is designed for GM LS Gen III cathedral port applications, including 5.7L/346ci.

Will this intake fit LS cathedral port engines like 4.8L, 5.3L, 5.7L, or 6.0L combinations?
Yes, this intake is designed for LS cathedral port combinations commonly used in Gen III-based applications.

What type of carburetor does this intake support?
This intake uses a 4150 square bore carburetor flange and is designed for carbureted applications.

What RPM range is this intake designed for?
This intake is designed to operate from 1,500-6,500 RPM, making it suited for broad street and street/strip performance.

How does a dual-plane intake help performance?
A dual-plane intake helps improve low-end torque and mid-range drivability by maintaining strong air velocity through the operating range.

Is this intake better for street or race use?
This intake is best suited for street performance and mild street/strip applications where broad power and drivability matter.

What type of intake manifold is this?
This is a dual plane, for cathedral applications intake manifold built to improve airflow and support performance LS combinations.

Will this intake clear a stock hood?
It features a performance-oriented intake profile, with a front height of 5.070 in., rear height of 6.140 in., so hood clearance should always be checked against your specific vehicle combination.

What material is this intake made from?
It is made from aluminum, which helps reduce weight while supporting strength and heat control for performance use.

Is this a direct bolt-on carbureted intake manifold?
In most cases, this intake is designed as a direct-fit carbureted manifold for compatible LS applications, though proper gaskets, fuel system setup, and supporting components are still recommended.

What else should I know before installation?
As with any performance intake upgrade, proper fuel, ignition, and tuning support are important to get the best results from the manifold.

Will this intake improve throttle response on my LS build?
Yes, this intake is designed to improve airflow and mixture distribution, which can help deliver stronger throttle response and more consistent power.

Is this a good upgrade from a stock intake?
Yes, this intake is a strong upgrade for compatible LS applications that need better airflow, stronger power potential, and improved performance over a stock-style manifold.

Does the polished finish affect performance?
No, the polished finish is cosmetic and does not change performance—it gives the intake a bright, show-quality appearance.

How do I maintain the polished finish?
Regular cleaning and occasional polishing will help maintain the shine and reduce surface oxidation over time.