Holley Hi-Ram Lower Manifold - GM LT1 - 300-237 chrome This bolt-on emissions legal system

This bolt-on emissions legal system fits trucks with the 4

4L V8 1979 - 1986 GMC C3500   454/7

1987-1990 GMC R2500 Suburban

Premium aluminum manifold gaskets and collector hardware is included

Classic Zinc finish for corrosion resistance and classic Holley looks

Holley Hi-Ram Lower Manifold - GM LT1 - 300-237 chrome This bolt-on emissions legal systemOverview: The 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