Holley LS Hi-Ram EFI Manifold - Black - 300-123BK
SKU: 91828615211

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: 91828615211

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Dawn
Natrona Heights, US
★★★★★ 4
Very nice if you aren't too pick on actual color.
Size: Single Pelt/2 ft x 3 ft, Color: Blue
Colors may vary. I really liked this, it was the perfect size and that perfect combination of soft and fluffy, but not being "too fluffy" and looking like a shaggy dog that needed a haircut. My only complaint was the color. Supposed to be blue, and I know monitors and lighting distort stuff but this was an obvious turquoise/teal. Much much greener than I was looking for. I could have made any variant of an actual blue work from powder baby to practically navy, but not this. I had to return, but other than the color, this seemed to be a very nice rug. Sad the color was so off.
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Reviewed in the United States on February 10, 2025
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Mary
Waukegan, US
★★★★★ 5
Very Nice
Size: Double Pelt/2 ft x 6 ft, Color: Mocha
Great in my office chair for added comfort
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Reviewed in the United States on April 9, 2026
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Ninel Bubon
Port Orchard, US
★★★★★ 5
It is real and natural. No synthetic- no allergy!!!
Size: 2' x 6' (Double Pelt), Color: Brown Tipped
SUPER QUALITY, the color is exactly like on the picture, I love it!!! Thank you!
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Reviewed in the United States on April 3, 2026
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Lexi
Lake Worth, US
★★★★★ 5
Super soft & cute
Color: Pink, Color: Pink
The color is amazing, between that & how soft it is, my brain is so happy about it lol. Matches my covers nicely (also got from amazon). The things shed very slightly, but I personally think its so worth it lol. I have a mini car vacuum & a lint roller, so its easy for me to keep it tidy anyhow. The bejeweled circle for a push to start, well I don't have that in my car. However the circle fit perfectly on my cold/hot knob lol literally the exact same diameter. Highly recommend this set, especially for this price.
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Reviewed in the United States on August 1, 2024
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Leandra Ocasio
Carnegie, US
★★★★★ 5
Good Deal
Color: Royal blue
Wish I would’ve seen this package before buying the items individually but I still bought it because it’s a good deal. Looks great in my blue Honda CR-V. So soft!
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Reviewed in the United States on December 8, 2025

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