Cathedral Port Single Plane Intake Manifold For GM III LS1/LS2 RPM 3,500-8,000

Single Plane Intake Manifold for GM LS1/LS2

This cathedral port single plane intake manifold for GM LS1 and LS2 engines is designed to support high-rpm airflow in the 3,500 to 8,000 RPM range.

Overview

This cathedral port single plane intake manifold for GM LS1 and LS2 engines routes air from the throttle body into the cylinder heads with a short, direct runner design aimed at upper-rpm power. The single plane layout favors sustained high-rpm breathing between 3,500 and 8,000 RPM, making it a fit for builds that spend time in the upper rev range. It suits engine builders and racers working with cathedral port LS heads who want a manifold matched to a performance cam and higher stall or manual transmission.

Built For Performance

• Single plane runner design tuned for the 3,500 to 8,000 RPM power band
• Cathedral port flange matches LS1 and LS2 cylinder head intake ports
• Short runner geometry reduces restriction at high airflow demand
• Cast aluminum construction for strength and heat resistance
• Designed as a direct fit for GM LS1 and LS2 intake mounting

Fits These Machines

• for GM LS1 engines
• for GM LS2 engines
• for cathedral port LS cylinder heads

On-The-Job Use

• Drag and circuit builds chasing upper-rpm horsepower
• Engine swaps needing a compact single plane intake
• Cam and cylinder head upgrades on cathedral port LS engines
• Street and strip cars with manual or high-stall automatic transmissions

Specs At A Glance

Good To Know

Q: Will this manifold work with a stock throttle body and fuel rail? A: Throttle body and fuel rail compatibility depends on the specific accessory drive and injector setup, so verify mounting patterns and heights before ordering. Many builds pair a single plane like this with an aftermarket cable-driven throttle body.

Q: Does a single plane manifold hurt low-rpm torque? A: A single plane trades some low-rpm torque for stronger upper-rpm breathing, so it works best with a cam and gearing matched to the 3,500 to 8,000 RPM range. Confirm the combination with your engine builder.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.