Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227BK h-pipe 4L V8 1976 - 1977

4L V8 1976 - 1977 GMC K25 Suburban   454/7

Maximum Temperature Recording (MTR) devices on rotors

The 12-768 includes the same plus an additional 26-163 Bulkhead harness to help you build your system

304 Stainless Steel Provides Increased Corrosion Resistance

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227BK h-pipe 4L V8 1976 - 1977Overview: The Holley GM LS1 LS2 LS6 Modular Hi Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet metal for high performance applications where induction system height is not limited. Coupling this Hi Ram intake with the high flowing LS1 LS2 LS6 style cylinder heads has outstanding potential for N A and forced induction applications at a budget minded cost. Aggressive, bold, race bred styling will make bad intentions