Skip to product information
1 of 3
Top Street Performance

GM LS Rectangle Port EFI Single Plane Aluminum Intake Manifold - Satin

GM LS Rectangle Port EFI Single Plane Aluminum Intake Manifold - Satin

SKU: SKU: 81136

Regular price $479.12
Sale price $479.12 Regular price $544.45
Shipping calculated at checkout.

In 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 LS3, L92, L99, LY6 & L76 applications
  • Single-plane design improves airflow
  • Lightweight satin aluminum construction
  • Fuel rails included for EFI installation

Description

Upgrade your LS-powered build with the Top Street Performance GM LS Rectangle-Port EFI Single Plane Aluminum Intake Manifold. Designed for Chevrolet LS rectangle-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 throughout the manufacturer's published 2,500-7,000 RPM operating range, making it an excellent choice for naturally aspirated and boosted LS engine combinations seeking improved induction performance.

Constructed from lightweight satin 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 Chevrolet LS rectangle-port engines including LS3, L92, L99, LY6, and L76 rectangle-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 LS3-powered Camaro SS, Corvette, Pontiac G8 GXP, LY6-powered Silverado HD, GMC Sierra HD, Yukon XL 2500, or building a custom rectangle-port LS project, this satin 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 Rectangle-Port EFI Single Plane Intake Manifold is engineered for enthusiasts seeking improved airflow and increased engine performance. Its single-plane design utilizes a common plenum layout that promotes stronger airflow and increased power production at higher engine speeds. Lightweight satin 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 throughout the manufacturer's published 2,500-7,000 RPM operating range, making it an excellent choice for street performance vehicles, LS swaps, naturally aspirated combinations, and boosted engine builds seeking improved induction performance.

Specs

Basic Operating RPM Range2,500-7,000 RPM
Carburetor Flange Style4150 Square Bore
Carburetor Quantity1
Center Maximum Height5.417 in.
ColorSatin
Deck HeightStandard
EGR PortNo
Front Maximum Height5.417 in.
Fuel Injection StyleMulti-port Fuel Injection
Fuel Injector Stye ProvisionEV1
Fuel Rail ColorBlack
Fuel Rail Fitting Thread Diameter-8 AN
Fuel Rail MaterialAluminum
Fuel Rails IncludedYes
Fuel System TypeElectronic Fuel Injection
Gasket Or Seal IncludedYes
Grade TypePerformance
Intake Port ShapeRectangle
MaterialAluminum
Mounting Hardware IncludedYes
Mounting Hole Quantity10
Rear Maximum Height5.417 in.
Single Or Dual Plane TypeSingle Plane

Engine Fitment

COMPATIBLE WITH
CHEVROLET LS RECTANGLE-PORT ENGINES
• 6.0L / 364 in³ (LY6*, L76*)
• 6.2L / 376 in³ (LS3, L92, L99)
* Rectangle-port applications only.

COMMON VEHICLE APPLICATIONS
• Chevrolet Camaro SS
• Chevrolet Corvette (LS3)
• Chevrolet Silverado 2500HD / 3500HD (LY6)
• GMC Sierra 2500HD / 3500HD (LY6)
• Chevrolet Suburban 2500 (LY6)
• GMC Yukon XL 2500 (LY6)
• Pontiac G8 GXP
• Chevrolet SS

NOTES
• Fits Chevrolet LS rectangle-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 LS1, LS2, LS6, LR4, LM7, LQ4, LQ9, or other cathedral-port cylinder heads
• Will not work with LS7

Q&A

What engines is this intake manifold designed for?
This intake manifold fits Chevrolet LS rectangle-port engines including LS3, L92, L99, LY6, and L76 applications.

Will this intake manifold fit an LS3 engine?
Yes. LS3 applications are specifically listed in the published fitment.

Will this intake manifold fit an L92 engine?
Yes. L92 rectangle-port applications are supported.

Will this intake manifold fit an L99 engine?
Yes. L99 rectangle-port applications are supported.

Will this intake manifold fit a LY6 engine?
Yes. Compatible LY6 rectangle-port applications are supported.

Will this intake manifold fit an LS1 or LS6 engine?
No. LS1 and LS6 engines use cathedral-port cylinder heads and are not compatible with this intake manifold.

What is the benefit of a single-plane intake manifold?
A single-plane intake manifold helps improve airflow and performance potential by utilizing a common plenum design that supports increased airflow demand.

Are fuel rails included?
Yes. Fuel rails are included for simplified EFI installation.

Is this intake manifold designed for boosted applications?
Yes. The high-flow design makes it suitable for naturally aspirated, turbocharged, and supercharged LS engine combinations.

Will this intake fit LS7 cylinder heads?
No. The published fitment does not include LS7 applications.

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."