SKU: HLY-300-228
300-228 Holley Hi Ram Tunnel Ram - Manifold GM LS7 HI-RAM

• Port Size – 2.49” Height x 1.21” Wide
• Mounting Flange Gasket Type – Standard LS3 Molded O-Ring
• Plenum Top Gasket Type – 3/32” Round O-ring Cord
• Runner Length – 6.29”, As-Cast Runner Cross-Sectional Area – Tapered 4.67 in² to 2.84 in²

The Holley GM LS7 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

 LS7 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 clear for drag race, muscle car, marine, off–road, sandrails, pulling trucks, 

track, street–rod applications and more! • The base is designed to be modular in configuration to accept a wide range of 

carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems. 

• Runner length and the tapered cross–section designed to perform well for a wide range of engine configurations • \

EFI fuel rails are machined for –8AN O–ring Fittings with passages large enough to accommodate high fuel flows and 

dampen pressure pulsations in the fuel system and come standard with EFI Hi–Ram kits. • Cast aluminum construction. •

 Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000–8000+RPM.