Intake Manifold Single Plane - Carb GM LS3/L92

The Holley 300-131 Intake Manifold Single Plane Carb is a purpose-built aluminum intake designed for GM LS3 and L92 engines running carbureted configurations. This mid-rise, square-bore single-plane manifold delivers the intake velocity and runner tuning required for high-RPM power bands in street performance, bracket racing, and engine swap applications where traditional EFI systems are not the goal.

Single-plane intake designs concentrate fuel charge velocity into the cylinders across a narrower RPM window compared to dual-plane alternatives, making them the choice for builders targeting peak horsepower in the mid- to high-RPM range. The natural aluminum finish resists corrosion under standard engine bay conditions while allowing easy cleaning and inspection. At 14.12 lbs, the manifold's weight is competitive for aluminum LS-series intakes, minimizing parasitic mass while maintaining structural rigidity under boost or high-combustion pressures. The square-bore design ensures compatibility with standard carburetors in this displacement class and accommodates Holley's ecosystem of tuning jets and metering blocks.

Buyers selecting a carbureted LS3 or L92 intake are typically building engine swaps into older platforms, restoration projects, or purpose-built race cars where simplicity and tuning control take priority over emissions compliance. This manifold serves that market directly—no computer interfaces, no oxygen sensor bungs, no EFI fuel rails. Installation requires only standard engine bay space and standard carburetor mounting hardware. The mid-rise height positions the carburetor at a practical height for hood clearance while optimizing plenum volume for the target displacement range.