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Top Street Performance

GM LS Gen III Cathedral Port Carbon Fiber Low-Rise Intake Manifold

GM LS Gen III Cathedral Port Carbon Fiber Low-Rise Intake Manifold

SKU: 81631

$4,290.00
$4,290.00 $4,875.00
Shipping calculated at checkout.

Out of stock

Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.

Product Details

Features

  • Fits LS1, LS6 & Gen III LS engines
  • Lightweight carbon fiber construction
  • Low-rise design for swap applications
  • Supports high-horsepower EFI builds

Description

Upgrade your LS-powered build with the Top Street Performance GM LS Gen III Cathedral Port Carbon Fiber Low-Rise Intake Manifold. Engineered for LS1, LS6, 4.8L, 5.3L, 5.7L, and 6.0L cathedral-port engines, this LS carbon fiber intake manifold combines lightweight construction, exceptional airflow capability, and modern performance styling for street, track, and LS swap applications.

Constructed from premium carbon fiber with precision-machined aluminum flanges, this LS cathedral port intake manifold helps reduce weight while minimizing heat transfer compared to traditional cast aluminum designs. The low-rise runner configuration is engineered to provide excellent airflow and throttle response while maintaining clearance in many performance and engine swap applications.

Designed for electronic fuel injection systems, this LS EFI intake manifold features a large 102.2mm throttle body opening, Gen IV 3-bar MAP sensor provision, and LS1-style injector compatibility. The removable top design allows easier access for tuning, maintenance, inspection, and future upgrades, making it an excellent choice for enthusiasts building high-performance street vehicles, race cars, restomods, and custom LS swaps.

Whether you're upgrading an LS1 intake manifold, building a turbocharged 5.3 LS, improving airflow on a 6.0 LS project, or assembling a high-horsepower cathedral-port engine combination, this carbon fiber LS intake manifold delivers the airflow capacity, weight savings, and performance potential serious enthusiasts demand.

 

Carbon Fiber Intake Manifold Technology
The Top Street Performance LS Gen III Cathedral Port Intake Manifold is engineered for enthusiasts seeking maximum airflow, reduced weight, and premium engine bay appearance. Constructed from lightweight carbon fiber with precision-machined aluminum flanges, this intake manifold helps reduce heat transfer while providing the strength required for high-performance applications.

Performance Benefits
The low-rise runner design promotes efficient airflow and strong throttle response while maintaining excellent fitment for many street performance and LS swap applications. Designed to support high-horsepower EFI combinations, this LS intake manifold provides the airflow capacity needed for naturally aspirated, nitrous, supercharged, and turbocharged engine builds.

Specs

Basic Operating RPM Range 1,500-9,000 RPM
Color Black
Deck Height Standard
Fuel Injection Style Multi-port Fuel Injection
Fuel Injector Stye Provision 2.55 in. LS1 style
Fuel Rail Color Black
Fuel Rail Finish Black
Fuel Rail Fitting Thread Diameter 10 ORB
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
Manifold Absolute Pressure Sensor Port Included Yes
Manifold Absolute Pressure Sensor Port Style Gen IV 3-bar
Manifold Finish Natural
Material Carbon Fiber
Mounting Hardware Included Yes
Mounting Hole Quantity 10
Removable Runners Yes
Removable Throttle Body Flange No
Removable Top Yes
Supplemental Boss Quantity 2
Throttle Body Bore Size 102.200 mm

Engine Fitment

COMPATIBLE WITH
GM Gen III Cathedral Port LS Engines
• 4.8 L / 293 in3
• 5.3 L / 325 in3
• 5.7 L / 346 in3
• 6.0 L / 364 in3

COMMON VEHICLE APPLICATIONS
• Chevrolet Camaro LS swaps
• Chevrolet Corvette LS1 & LS6 applications
• Chevrolet Silverado LS builds
• Chevrolet C10 LS swaps
• Chevrolet Chevelle LS conversions
• Pontiac GTO LS projects
• Custom street rods and restomods

NOTES
• Fits GM Gen III cathedral-port LS cylinder heads
• Designed for EFI applications only
• Features a 102.2mm throttle body opening
• Includes black aluminum fuel rails with 10 ORB fittings
• Uses LS1-style injector provisions
• Includes Gen IV 3-bar MAP sensor port
• Removable top design simplifies tuning and maintenance
• Verify throttle body, fuel system, injector, and hood clearance before installation
• Intended for off-road, racing, or exempt applications where applicable

Q&A

Will this intake manifold fit an LS1 engine?
Yes. This intake manifold is designed for GM Gen III cathedral-port LS engines, including LS1 applications.

Will this intake fit a 5.3 LS engine?
Yes. Compatible 5.3L cathedral-port LS engine combinations are supported.

Will this intake fit LS3 cylinder heads?
No. LS3 engines use rectangle-port cylinder heads and require a rectangle-port intake manifold.

What are the benefits of carbon fiber construction?
Carbon fiber helps reduce weight, improve thermal insulation, and provides a premium appearance compared to traditional cast aluminum intake manifolds.

Is this intake manifold designed for EFI or carbureted applications?
This intake manifold is designed for electronic fuel injection (EFI) applications.

What throttle body size does this intake support?
The manifold features a 102.2mm throttle body opening.

Does this intake include fuel rails?
Yes. Black aluminum fuel rails with 10 ORB fittings are included.

Is this intake suitable for turbocharged or supercharged applications?
Yes. The high-flow design and EFI configuration make it suitable for naturally aspirated and boosted performance combinations.

Emissions Notice

This product is legal for off road use and non pollution controlled vehicles (1965 & older); however, it has not been tested or approved by the California Air Resources Board (CARB) for highway vehicles in the state of California. By purchasing this product, buyer agrees it will not be used on pollution controlled vehicles in California, or in a state with similar emissions regulations.