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![Carbureted Hi-Ram Lower Manifold Base [GM LS7]](https://www.jegs.com/images/mini_750/500/510/510-300-228bk.jpg)
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LS Modular Hi-Ram Base Only
Carbureted Hi-Ram Lower Manifold Base GM LS7. 2.490 in H x 1.210 in. W Port Size 6.290 in. Runner Length Black Finish
Holley 300-228BK Features:
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!HOLLEY,HOLLEY,• 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.HOLLEY,HOLLEY,• Runner length and the tapered cross-section designed to perform well for a wide range of engine configurationsHOLLEY,HOLLEY,• 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.HOLLEY,HOLLEY,• Cast aluminum construction.HOLLEY,HOLLEY,• 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.- 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
- 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
Part TypeIntake Manifold
BrandHOLLEY
Package Height10.0
Package Width14.75
Package Length20.75
Weight21.5 PG
Part CategoryPerformance Parts
Port Height2.49 in (63.2 mm)
Hardware IncludedYes
Intake MaterialAluminum
Intake StyleBase
QuantitySold individually
Port Width1.21 in (30.7 mm)
Port StyleLS7
Cylinder Head TypeLS7
Intake FinishBlack
Gasket MaterialO-ring
Engine Make/SizeGM LS
Vendor Part Number300-228BK
Package Qty1
Package TypeEA
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