SKU: 557473057

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227

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Description

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227Overview: 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

Overview:

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 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 – 6.58”, As-Cast Runner Cross-Sectional Area – Tapered 4.25 in² to 2.53 in²

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley EFI
Color Natural
Construction Cast
Emission Code 3
Engine GM Small Block Gen III/IV (LS Based)
Fuel System Type EFI
Product Type Manifold
Type of Component Lower Manifold
Warranty Limited 90 Day
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SKU: 557473057

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4.0 ★★★★★
Based on 11 reviews
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Product Reviews
C
Verified Purchase
C Hwang
Draper, US
★★★★★ 5
Excellent
Format: Paperback
As a second-year cardiology fellow, I used to get very confused with hemodynamics during my cath and CCU rotations. This book is a gem, it is clear and logically written, has great explanations of waves and great illustrations. The constrictive pericarditis, valvular disease, and FFR chapters are impressive with echocardiographic and physiologic correlations. I actually liked everything I read, like the nice differentiation between the pressure tracings of various chambers. Some of it requires multiple reads but it is worth it. I realized that I had missed a great deal of the basic understanding of pressure tracing configuration, wedge pressure, shunts. There are also over 50 cases in a test-answer format probably covering and reviewing most hemodynamic topics. It is like 2 books in 1.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2013
A
Verified Purchase
Aziz A
Louisville, US
★★★★★ 3
Black and white
Format: Paperback
Bought this book. Good content. However my copy is in black and white. There are references to colored arrows. I later learned that others have a colored copy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2026
A
Verified Purchase
Alexandra Joseph
Battle Creek, US
★★★★★ 5
AMAZING BOOK!!!!!
Format: Paperback
AMAZING BOOK!!!!!! WOW!!! everything you need to know about hemodynamics. This book explains the concepts with graphing, images. It also summarizes the key points. I wish I have read that book sooner. I could not believe it that in 1 book I found all the information I needed for the cardiology boards and my daily practice. Thank you o ugh Dr. Hanna for taking the time to write this book. Much Thanks!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 5, 2020
M
Verified Purchase
Mrs. B.
Phoenix, US
★★★★★ 5
A welcome addition to training in hemodynamics
Format: Paperback
Purchased this book for my husband, the director of the Invasive Cardiovascular Technologist Program at a small college. He has been very pleased with the book, calling it a long-overdue addition to the field. It's very helpful in training technologists and others working in Cardiac Cath Labs to recognize hemodynamic waveforms and do calculations. It offers a lot of practice questions in addition to explanations.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2021
N
Verified Purchase
N. J. Manjarrez
Draper, US
★★★★★ 4
Clear Concise
Format: Paperback
I like the way that this book is laid out. Rather than long drawn out droning chapters it is split into shorter more specific sections. The graphics are plenty big. The case examples and guided questions are useful in reinforcing the knowledge. A good resource for any new CVT or CVT student.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2013

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