SKU: 9830618875

Holley LS Hi-Ram EFI Manifold - 300-123

Sale price$539.98 Regular price$599.98
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Description

Holley LS Hi-Ram EFI Manifold - 300-123Overview: 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:

  • Base Plenum Top Mounting Flange Height – 8.42” to the lifter valley cover flange on engine block.
  • Total Height with 92/105mm EFI Plenum Top – 12.32” to the lifter valley cover flange on engine block.
  • Runner Length – 6.58”, As-Cast Runner Cross-Sectional Area – Tapered 4.25 in² to 2.53 in²
  • Throttle Body Flange Location, with 102mm EFI Plenum Top : Height – 8.42” (from engine block lifter valley cover flange), Longitudinal Location – 3.84” (forward from engine block front flange), Angle – 25 deg. (down from vertical)
  • Plenum Top Gasket Type – 3/32” Round O-ring Cord
  • Mounting Flange Gasket Type – Standard LS3 Molded O-Ring
  • Port Size – 2.49” Height x 1.21” Wide

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley EFI
Color Aluminum
Construction Cast
Emission Code 3
Engine GM Small Block Gen III/IV (LS Based)
Finish Satin
Flange Style EFI
Front Height 12.32 inch
Fuel System Type EFI
Manifold Type Hi-Ram
Product Type Manifold
Rear Height 11.00 inch
RPM Power Band 1500-7000
Warranty Limited 90 Day
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 9830618875

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Lisa’s Log-in!!
Alexandria, US
★★★★★ 5
Just Beautiful!!
Format: Paperback
absolutely phenomenal—an easy five-star read for me! This story is rooted in redemption, survival, and forgiveness, and it delivers on every level. The emotional depth of the characters really stood out, especially as we follow a journey shaped by years of guilt, pain, and hard-earned growth. Nothing felt rushed or surface-level—every layer of the story was intentional and meaningful. I especially loved how the author tied the theme of wildflowers into the narrative. It wasn’t just symbolic—it felt like a living, breathing part of the story, representing resilience and beauty rising from difficult circumstances. That connection made the story feel even more powerful and real. The character development was beautifully done. You could feel the weight of their choices, their struggles, and ultimately their transformation. It’s one of those stories that stays with you after you turn the last page.
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Reviewed in the United States on April 20, 2026
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Kristin
West Palm Beach, US
★★★★★ 4
Beautiful Writing, Slow Pace
Format: Kindle
After surviving a prison bus crash, Leigh escapes to start a new life. She eventually finds her way to a flower farm, where she falls in love, learns to trust, and is finally able to heal from her past. It’s a beautiful and moving story overall. It was nice to watch how much Leigh grew throughout the book. It felt earned. She actually put in the work, even when it was hard. I think that's what makes the story feel so real and emotional. The wildflower metaphor worked perfectly throughout the book. Yes, it's a bit cliché, but it was done well in this book. It didn't come across as lazy or simplistic. As a flower lover, the setting was my favorite thing. The author’s descriptions were just beautiful. So much of it reads like poetry. You can tell how much thought she put into every single word. Unfortunately, the pacing was too slow for me. At times, it felt like it was dragging on and even got repetitive. The book could have been shorter and had a greater impact.
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Reviewed in the United States on March 23, 2026
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tai tai
Los Angeles, US
★★★★★ 5
🌸🌼🌸🌼
Format: Kindle
Where the Wildflowers Grow and this book was such an emotional journey. What started as a survival story slowly turned into a story about healing, identity, forgiveness, and learning how to live again after trauma. Leandra endured more pain than most people could imagine. Losing her family, spending five years in prison, and surviving the prison transport bus crash would have been enough to completely harden her. Instead, watching her reinvent herself as Leigh and slowly rediscover who she was outside of survival mode made this story feel deeply human and realistic. I really loved the symbolism of the flower farm and how Jackson became a safe place for her without trying to “fix” her. Their relationship felt patient, healing, and genuine. The romance never overshadowed Leigh’s personal growth, which I appreciated. This book truly explored what it means to be loved properly while still carrying scars from your past. What kept me invested the entire time was the tension hanging over everything. Even during the peaceful moments, you knew the secrets surrounding Leigh’s past would eventually surface. And when the truth finally came out, the consequences were emotional and impactful instead of feeling overly dramatic.
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Reviewed in the United States on May 28, 2026
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Miss Brown
Natrona Heights, US
★★★★★ 5
Fantastic Book!
Format: Paperback
“This book is such an amazing, thought-provoking, raw, and beautifully written novel. I thoroughly enjoyed every page and truly could not put it down. The characters came alive in such a vivid and unforgettable way that I was genuinely sad when the story ended, and I cried so much at the end. It pulled at my heartstrings in the most beautiful, poignant, and emotionally honest way. A truly unforgettable read.”
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Reviewed in the United States on May 27, 2026
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Carrie
Massapequa, US
★★★★★ 3
emotionally rich but overly long.
Format: Kindle
Where the wildflowers grow has some generally moving moments, especially around grief, healing, and found family. The flower farm setting is comforting, and Leigh’s trauma feels authentic. However, the pacing is slow in the middle. Some of the plot twist are fairly predictable. I felt the love between Leigh and Jackson was moving, and I felt her healing with Tibbs and Luke was very emotional. The book lies heavily into melancholy, but I I’m glad that I read it. I didn’t feel like it was a complete waste of time. I just wish it was maybe a little shorter.
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Reviewed in the United States on May 16, 2026

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