Holley Hi-Ram Lower Manifold - GM LT1 hook This extensive calibration process is

This extensive calibration process is performed to guarantee our customers the smoothest and most reliable injectors the diesel industry has ever seen

or the smaller diameter plugs under the valve cover

Your loyal companion deserves the very best

(1) Aluminum Spacer plate

Holley Hi-Ram Lower Manifold - GM LT1 hook This extensive calibration process isThe new Holley EFI Hi Ram intake provides the ultimate performance with the new GM direct injected Gen V 6. 2L LT1 engine. The modular design of this manifold allows easy disassembly for custom porting, multiple tops, or custom induction systems. Each runner has a large radius where it meets the plenum, and optimized taper & cross sectional area to perform in a wide variety of engine configurations. The optional injector bosses on the intake runners