GM LS Hi-Ram Intake Sys. - 92mm EFI Throttle Body

The Holley GM LS Hi-Ram Intake System with 92mm EFI Throttle Body is a high-flow intake manifold engineered for LS-series engine platforms requiring elevated air velocity and dual-plane port distribution. Designed for LS3 and L92 variants, this aluminum casting supports multi-port fuel injection and delivers the precise volumetric efficiency demanded in performance and competition builds. Field experience across engine swaps and restoration projects confirms that a properly matched intake manifold directly influences throttle response, mid-range torque delivery, and overall drivability—making manifold selection as critical as fuel system or ignition tuning.

The Hi-Ram design employs a dual-plane configuration that optimizes air-fuel mixture distribution across all cylinders while the 92mm throttle body flange ensures compatibility with modern EFI systems and allows seamless integration with stand-alone or OEM engine control modules. Constructed from cast aluminum in natural finish, the manifold resists thermal distortion and accommodates both intake valve timing events and peak torque windows typical of naturally aspirated and boosted LS applications. The multi-port layout prevents fuel pooling and supports accurate fuel metering across the RPM band, critical for consistent performance in dyno-verified builds and road-course environments.

This intake system is ideal for engine builders, performance shops, and enthusiasts upgrading Gen III/IV LS powerplants for street or track duty. Installation requires standard LS-series intake gasket and fastener kits; verify throttle body linkage clearance and fuel rail positioning before final assembly. The 92mm throttle body flange accepts both cable and electronic throttle body applications, providing flexibility across various control system architectures. Weighing 38.1 lbs and measuring 15.75 x 14.5 x 27 inches, this manifold fits within standard engine bay dimensions on LS-swapped platforms and late-model Chevrolet vehicles. Proper intake runner velocity and matched fuel delivery unlock the full potential of LS-series displacement and compression ratio.