Holley LS Hi-Ram EFI Manifold - 300-123
SKU: 83191920768

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
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 83191920768

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Lauren
Alexandria, US
★★★★★ 5
Adorable chic toddler sandal
Size: 8 Toddler, Color: Macaroon
Very nice quality and value. Fit well on my 3 year old. No complaints about comfort. Velcro worked fine and didn’t loosen. No complaints about blisters.
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Reviewed in the United States on October 28, 2025
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Rosalind C.
Chelsea, US
★★★★★ 5
Cute sandals
Size: 10 Toddler, Color: Macaroon
Yall these are so cute! It has a matte color. They are wide enough for my tall child and it will go cute with a few outfits. I will recommend.
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Reviewed in the United States on February 4, 2026
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David
Birmingham, US
★★★★★ 5
Safe, Comfortable, and Eco-Friendly Summer Sandals for Kids
Searching for the perfect pair of summer sandals for my child can often feel like a daunting task, but the Swalker Children's Soft Jelly Sandals have truly exceeded my expectations in every way. First and foremost, safety is paramount when it comes to children's footwear, and these sandals deliver on all fronts. The closed-toe design provides ample protection against stubbed toes and sharp objects, giving me peace of mind as my little one explores the outdoors. Additionally, the anti-slip sole offers excellent traction on various surfaces, preventing slips and falls even on wet or uneven terrain. Comfort is another crucial factor, especially during long days of play. These sandals feature a soft jelly material that is gentle on my child's feet, eliminating any discomfort or rubbing that can often accompany other types of shoes. The easy-wear design allows my child to slip them on and off effortlessly, promoting independence and convenience for both of us. What sets these sandals apart is their eco-friendly construction. Made from recyclable materials, they not only provide exceptional quality but also contribute to a more sustainable future for our planet—a feature that I greatly appreciate as a conscious consumer and parent. Overall, the Swalker Children's Soft Jelly Sandals are a summer staple for any parent looking to prioritize safety, comfort, and sustainability for their child. With their durable construction and thoughtful design, they have quickly become my go-to choice for warm-weather adventures.
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Reviewed in the United States on February 8, 2024
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VickieP
Lexington, US
★★★★★ 5
Super soft and adorable!
Size: 9 Toddler, Color: Macaroon
Bought these shoes for my daughter as an alternative to the classic jellies! The are butter soft! She’s been wearing them consistently for weeks now and not a single blister as formed. (Unlike when she wore the classic style ones) I’m even buying my niece a pair for her birthday because she is now jealous! The color is perfect for any outfit or occasion. They can be dressed up or down which makes them the ideal shoe! And of course super easy to clean which is of course a major factor in kids’ shoes!
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Reviewed in the United States on May 1, 2025
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Pauline
Grantham, US
★★★★★ 5
LOVE these shoes
Size: 8 Toddler, Color: Macaroon
Absoultely LOVE these! So easy to wear for my 3 year old and put on. They are sturdy and could be rinsed off. They were very comfortable for her and left no marks on her skin. Warning to parents, if your kid steps on your foot it hurts like hell because they are like spikes under the shoe. GREAT for traction and running, but man it hurts. I will purchase more next summer. Great price, great fit, and lightweight.
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Reviewed in the United States on December 3, 2025

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