GM LS Intake Manifold Split Single Plane 4150

The GM LS Intake Manifold Split Single Plane 4150 by Holley is designed for serious LS engine builders and street performance enthusiasts who demand maximum airflow and responsive mid-range power. This single-plane design offers superior throttle response compared to dual-plane alternatives, making it ideal for naturally aspirated LS1, LS2, LS3, and LS9 applications where peak RPM performance is essential.

Holley's split single-plane configuration optimizes runner velocity and charge distribution across the eight cylinders, minimizing turbulence and dead zones that can affect performance. The manifold features a 4150 flange pattern, ensuring compatibility with standard Holley carburetors and most fuel injection systems. Its cast aluminum construction provides durability and thermal stability under high-RPM operation, resisting distortion while being significantly lighter than cast-iron alternatives.

This manifold excels in naturally aspirated LS engines targeting 6,500+ RPM operation, where single-plane designs are particularly effective for upper-rpm cylinder filling. Whether you're building a track-focused engine or a high-revving street machine, this manifold serves as a critical bridge between your cylinder head and carburetor or fuel injection setup, promoting consistent air-fuel mixing and cylinder-to-cylinder balance.