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Holley Hi-Ram Lower Manifold, GM LS7 300-228

Holley Hi-Ram Lower Manifold, GM LS7 300-228
$1,155.99 ea
NEWARRIVING SOONEstimated Ship Date 10/30/2024 (If Ordered Today)4 Available from HOLLEY PERFORMANCE PRODUCTS as of 10/12/2024
Model: 3992564
STANDARD
DELIVERY
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.
Features:
  • 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
These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration.
Installation Notes:
These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration.

About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!

Downloads:

Download Name File Size
199r10572rev6.pdf620.21KB

Videos:

Specifications:

Color Silver
Construction Cast
Emission Code 4, 3
Engine GM LS7
Finish Silver
Fuel System Type Carb
Part Type Engine Intake Manifold
Product Type Intake Manifold Base
RPM Power Band 3500-8000 RPM
Type of Component Lower Manifold
Warranty Limited 90 Day

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Holley Hi-Ram Lower Manifold, GM LS7 300-228:
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