Intake Manifold Single Plane - EFI GM LS3/L92

The Holley Intake Manifold Single Plane EFI for GM LS3/L92 engines is a purpose-built aluminum intake designed for high-performance applications requiring efficient fuel delivery and maximum airflow. This square-bore, multi-port design delivers the cylinder head signal characteristics needed for precise EFI tuning while maintaining the structural integrity required for sustained boost or naturally aspirated operation. Built from cast aluminum in natural finish, the unit weighs 14.25 lbs and integrates directly with LS-series engine architecture.

Single-plane intake manifolds prioritize peak power delivery across a narrower RPM band compared to dual-plane designs, making them the standard choice for dedicated performance engines where mid-range torque is less critical than top-end horsepower. The Holley 300-136 supports LS3 and L92 cylinder head combinations, accommodating both traditional LS3 architecture and the newer L92 head geometry with its improved flow characteristics. The multi-port configuration ensures proper fuel atomization and cylinder-to-cylinder distribution when paired with modern EFI systems, eliminating carburetor-specific tuning compromises.

This manifold targets builders and engine shops developing track-focused LS platforms, whether for road racing, drag racing, or high-output street applications where programmable fuel injection is standard. The single-plane design is particularly effective in turbocharged or supercharged builds where consistent cylinder charging pressure benefits from optimized plenum velocity. Installation requires compatibility verification with your specific LS-series block, cylinder head combination, and fuel injection controller, as EFI calibration will demand proper base fuel pressure and injector sizing for the intake's flow characteristics.

Holley's reputation in performance fuel systems and intake design rests on decades of racing heritage. The natural aluminum casting allows custom porting or coating applications if required by specific engine bay environments, though the casting as-shipped requires standard coolant passageway management and hose routing integration.