GM LS3 Intake Manifold Dual-Plane 4150 Flange

The GM LS3 Intake Manifold Dual-Plane 4150 Flange by Holley is designed for serious LS engine builders and performance enthusiasts who prioritize mid-range torque and throttle response. This manifold is ideal for street and modified applications, providing usable power across a broad RPM range rather than just peak horsepower at high RPMs.

Holley's dual-plane design effectively separates cylinder firing groups, optimizing runner lengths for improved lower and mid-range cylinder fill. This geometry enhances airflow velocity and scavenging, making it a superior choice compared to single-plane designs that focus on top-end power. The manifold features a 4150 carburetor flange compatible with most Holley and similar four-barrel carburetors, ensuring reliable fuel distribution.

This intake manifold is particularly beneficial for LS3 engines in various applications, including restomods and performance street engines. Its design allows for straightforward installation on any LS platform, accommodating stock or aftermarket cylinder head configurations. With a weight of 18.1 lbs, it balances structural integrity with manageable underhood weight.