SKU: 44351327302

Holley LS Hi-Ram EFI Manifold - Black - 300-123BK

Sale price$562.48 Regular price$624.98
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Description

Holley LS Hi-Ram EFI Manifold - Black - 300-123BKOverview: 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 Black
Construction Cast
Emission Code 3
Engine GM Small Block Gen III/IV (LS Based)
Finish Black
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: 44351327302

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TB82
Natrona Heights, US
★★★★★ 2
Huge amount of fabric at skirt, very unflattering
Size: X-Small, Color: Black Eyelet
This is a high quality and well-made dress, especially at the price point, but it is also one of the most unflattering things I have ever put on my body. I'm 5'7", size 2-4, 36B and bought the XS. The top was fine, but the skirt was GIANT. There is so much fabric, and it is a heavier weight so it doesn't really fall. On the bottom I looked like a size 10-12. There are also pockets to add to the bulk - unpopular opinion, but I can't stand pockets in dresses especially when they are made of heavier fabrics like this and add even more volume at the hips. The black eyelet 100% cotton fabric is nice but there is just way too much of it. I had ordered the brown gingham too but canceled the order after trying this one on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 8, 2025
L
Verified Purchase
Lauren
Omaha, US
★★★★★ 5
Restock brown gingham please. Size down - runs big. Love
Size: Medium, Color: Brandy Brown Gingham
Runs big size down. Please bring other sizes back in stock!! Brown gingham dress is so cute!! So comfortable. Fabric is light and soft. Will rebuy when others sizes come back in stock.
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Reviewed in the United States on October 4, 2025
A
Verified Purchase
Amazon Customer
Bozeman, US
★★★★★ 4
Size down
Size: Small, Color: White Eyelet
Cute dress, runs large. I’m usually a true medium but sized down to a small based on other reviews and it fits perfectly.
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Reviewed in the United States on August 7, 2025
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Verified Purchase
Diane ruffra
Bozeman, US
★★★★★ 4
It’s ok
Size: 4X, Color: Black
It’s ok
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Reviewed in the United States on March 30, 2026
H
Verified Purchase
Hamsamwich
Carnegie, US
★★★★★ 4
Skirt portion of dress was awesome!
Size: Medium, Color: Black
Great skirt with pockets. Loved the light cotton fabric. Needed a little more support up top than what the dress could give. Probably better for AA-C bust.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 6, 2025

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