GM LS Cathedral Port EFI Single Plane Aluminum Intake Manifold - Black
GM LS Cathedral Port EFI Single Plane Aluminum Intake Manifold - Black
SKU: SKU: 81137BK
In stock
Product Details
Features
- Fits LS1, LS6, LS2, 5.3L & 6.0L cathedral-port engines
- Single-plane design improves high-RPM airflow
- Lightweight black aluminum construction
- Fuel rails included for EFI applications
Description
Built for upgraded induction performance, this intake manifold supports improved airflow characteristics and stable fuel delivery for GM LS Series applications using properly matched carburetor or EFI configurations.
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.
Specs
| 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 | Black |
| Deck Height | Standard |
| EGR Port | No |
| Front Maximum Height | 5.417 in. |
| Fuel Injection Style | Multi-port Fuel Injection |
| Fuel Injector Stye Provision | EV1 |
| Fuel Rail Color | Black |
| Fuel Rail Fitting Thread Diameter | -8 AN |
| Fuel Rail Material | Aluminum |
| Fuel Rails Included | Yes |
| Fuel System Type | Electronic Fuel Injection |
| Gasket Or Seal Included | Yes |
| Grade Type | Performance |
| Intake Port Shape | Cathedral |
| Material | Aluminum |
| Mounting Hardware Included | Yes |
| Mounting Hole Quantity | 10 |
| Rear Maximum Height | 5.417 in. |
| Single Or Dual Plane Type | Single Plane |
Engine Fitment
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
• Single-plane intake manifold design
• Designed for electronic fuel injection systems
• Fuel rails included
• Verify injector, throttle body, fuel system, and hood clearance before installation
• Not compatible with LS3, L92, L99, LS7, LS9, LSA, or Gen V LT cylinder heads
Q&A
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 fuel system is this intake designed for?
This intake is designed for EFI applications using multi-port fuel injection, making it a strong choice for performance LS builds.
What RPM range is this intake designed for?
This intake is designed to operate from 2,500-7,000 RPM, making it suited for higher-RPM performance use.
How does a single-plane intake help performance?
A single-plane intake is designed to support stronger high-RPM airflow, making it a good choice for aggressive performance combinations that want more top-end power.
Is this intake better for street or race use?
This intake is better suited for aggressive street, street/strip, and higher-RPM performance applications.
What type of intake manifold is this?
This is a single 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 5.417 in., center height of 5.417 in., rear height of 5.417 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.
Does this intake support EFI-specific hardware?
Yes, this intake is designed around EFI applications and the supporting hardware needed for electronic fuel injection setups.
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 black finish affect performance?
No, the black finish does not change the manifold's performance characteristics—it mainly changes appearance and gives the intake a more aggressive look.
Is the black finish durable for long-term use?
Yes, the black finish is designed for durability and corrosion resistance when properly maintained.
Emissions Notice
This Top Street Performance (TSP) product is designed for racing and off-road competition use only. It is not legal for use on public roads or emissions-controlled vehicles and does not comply with federal, state, or local emissions regulations. The buyer assumes all responsibility for legal use and installation.
What is a Emissions-Controlled Vehicle?
"An emissions-controlled vehicle is any vehicle equipped with a factory-installed emissions control system designed to reduce air pollution. These systems include catalytic converters, oxygen sensors, EGR (Exhaust Gas Recirculation) valves, and diesel particulate filters (DPF). Most vehicles manufactured after 1975 are considered emissions-controlled and must comply with federal and state emissions laws when used on public roads."
GM LS Cathedral Port EFI Single Plane Aluminum Intake Manifold - Black
Upgrade your LS-powered build with the Top Street Performance GM LS Cathedral-Port EFI Single Plane Aluminum Intake Manifold. Designed for Chevrolet LS cathedral-port engines, this high-performance EFI intake manifold delivers increased airflow, improved throttle response, and enhanced performance potential for street performance, LS swaps, drag racing, and street/strip applications.
Engineered with a single-plane runner design, this LS intake manifold is built to support increased airflow demands compared to many factory-style intake systems. The large plenum and performance-oriented runner configuration help maximize airflow efficiency, making it an excellent choice for naturally aspirated and boosted LS engine combinations seeking improved induction performance.
Constructed from lightweight black aluminum, this EFI intake manifold provides excellent durability, corrosion resistance, and a clean performance appearance. Included fuel rails simplify installation and support modern electronic fuel injection systems, making this manifold a substantial upgrade for performance-minded enthusiasts.
Designed to fit a wide range of Chevrolet LS cathedral-port engines, including LS1, LS6, LS2, LM7, L59, LM4, L33, LH6, LC9, LH8, LQ4, LQ9, L98, and other compatible cathedral-port applications, this intake manifold is ideal for performance street vehicles, muscle cars, trucks, SUVs, and custom LS swap projects.
Whether you're upgrading an LS1-powered Camaro, LS6 Corvette, LS2 GTO, LM7 Silverado, LC9 Tahoe, or LQ9 performance truck build, this black aluminum intake manifold delivers the airflow capacity, EFI compatibility, and performance-focused design serious LS enthusiasts demand.
Single Plane Intake Manifold Technology
The Top Street Performance LS Cathedral-Port EFI Single Plane Intake Manifold is engineered for enthusiasts seeking increased airflow and improved engine performance. Its single-plane design utilizes a common plenum layout that promotes stronger airflow and increased power production at higher RPM levels. Lightweight polished aluminum construction provides durability while maintaining a professional performance appearance.
Performance Benefits
The single-plane intake design is engineered to support increased airflow and improved throttle response compared to many factory-style intake manifolds. Its large plenum and performance-oriented runner design help maximize airflow efficiency, making it an excellent choice for street performance vehicles, LS swaps, naturally aspirated combinations, and boosted engine builds seeking improved induction performance.
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
• Single-plane intake manifold design
• Designed for electronic fuel injection systems
• Fuel rails included
• Verify injector, throttle body, fuel system, and hood clearance before installation
• Not compatible with LS3, L92, L99, 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 Injection Style: Multi-port Fuel Injection
Fuel Injector Stye Provision: EV1
Fuel Rail Color: Black
Fuel Rail Fitting Thread Diameter: -8 AN
Fuel Rail Material: Aluminum
Fuel Rails Included: Yes
Fuel System Type: Electronic Fuel Injection
Gasket Or Seal Included: Yes
Grade Type: Performance
Intake Port Shape: Cathedral
Material: Aluminum
Mounting Hardware Included: Yes
Mounting Hole Quantity: 10
Rear Maximum Height: 5.417 in.
Single Or Dual Plane Type: Single Plane
