GM LS Gen IV Rectangle Port Carbon Fiber Hi-Rise Intake Manifold

• GM LS Series EFI intake uses 102.200 mm throttle-body sizing with Electronic Fuel Injection provisions for properly matched engine management.

• Rectangle intake port shape helps match compatible cylinder heads and gaskets.

• Fuel rails included: Yes. Rail fitting thread: 10 ORB. Injector provision: 2.55 in. LS1 style. Verify injector height and fuel-line routing.

• MAP sensor port: Yes with Gen IV 3-bar. Removable top: Yes. Removable runners: Yes. Check hood clearance, accessory clearance, and wiring reach before installation.

For applications that need reliable intake airflow and clean engine-bay fitment, this intake manifold combines durable construction with application-focused runner and plenum design.

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 does this LS rectangle port hi-rise intake manifold fit?
This intake manifold is designed for GM LS Gen IV engines with rectangle port cylinder heads, including LS3, L76, L92, and L99 applications. It is specifically engineered to match the larger rectangular intake ports for optimal airflow and performance.

Is this intake compatible with cathedral port LS engines?
No, this intake is not compatible with cathedral port heads (LS1, LS2, LS6). It is built exclusively for rectangle port LS engines, which require a different intake port shape and bolt pattern.

What is the advantage of a hi-rise LS intake manifold?
A hi-rise intake manifold is designed to maximize high-RPM airflow and horsepower, offering:
• Increased plenum volume
• Longer, higher-flow runners
• Improved airflow at high engine speeds

Compared to low-rise intakes, hi-rise designs are optimized for maximum top-end performance, especially in aggressive builds.

What RPM range is this hi-rise intake best suited for?
Hi-rise LS intake manifolds are typically designed for mid-to-high RPM performance, making them ideal for builds focused on strong top-end horsepower and track performance rather than low-end torque.

Will this hi-rise intake manifold fit under a stock hood?
In most cases, no. Hi-rise intake manifolds are taller than low-rise designs and may require:
• Hood modifications
• Cowl hoods
• Open engine bay setups

This design prioritizes airflow and performance over clearance.

What throttle body size does this intake support?
This intake manifold is designed for a 102mm throttle body opening, supporting high-airflow EFI setups and helping maximize horsepower on modified LS engines.

What are the benefits of a carbon fiber LS intake manifold?
Carbon fiber construction offers several advantages over traditional materials:

• Lightweight design reduces overall engine weight
• Lower heat soak improves intake air temperatures
• Enhanced airflow efficiency
• High-end carbon fiber appearance

These benefits contribute to improved performance and engine bay aesthetics.

Does this intake manifold include fuel rails and hardware?
Yes, this intake includes black anodized aluminum fuel rails with AN/ORB fittings, along with installation hardware, making it suitable for high-performance EFI fuel systems.

What fuel injectors work with this intake?
This intake is designed for LS-style injectors (EV1 / LS spacing), making it compatible with a wide range of aftermarket and OEM fuel injectors used in LS builds.

Does this intake support a MAP sensor?
Yes, it includes a provision for a GM Gen IV MAP sensor, which is important for both naturally aspirated and boosted setups.

Is this intake manifold good for turbo or supercharged LS builds?
Yes, this hi-rise intake is well-suited for boosted applications, thanks to:
• Large plenum volume
• High-flow runner design
• Compatibility with upgraded throttle bodies and MAP sensors

Proper tuning and supporting modifications are required for best results.

What makes a hi-rise intake better than a low-rise intake?
A hi-rise intake manifold is designed for:
• Maximum horsepower at high RPM
• Improved airflow for large displacement or cammed engines
• Better performance in racing and track environments

Low-rise intakes, by comparison, are better for hood clearance and street drivability.

Is this intake manifold good for LS swaps?
Yes, but it is best suited for performance-focused LS swaps where:
• Hood clearance is not a limitation
• Maximum airflow and horsepower are priorities
• The build is geared toward racing or aggressive street performance

Why use a rectangle port intake on LS3 engines?
Rectangle port heads (LS3, L92, etc.) are designed for higher airflow capacity, and pairing them with a matching intake ensures:
• Proper airflow distribution
• Maximum horsepower potential
• Optimal engine efficiency

Using the correct port style is critical for performance and proper fitment.

Is this intake manifold street legal in California?
This intake is intended for off-road or racing use only and may not be legal for use on emissions-controlled vehicles in states like California.