SKU: 684123817

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

Sale price$472.48 Regular price$524.98
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Description

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227BKOverview: 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
  • Black

 

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)
Fuel System Type EFI
Product Type Manifold
Type of Component Lower Manifold
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:
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  • 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: 684123817

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San Leandro, US
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Work 👍 great
Size: Size 1, Unit Count: 128
Diapers work 👌 perfect. I received them a day late & needed them for a baby shower. Amazon Prime stated that I would receive them the next day, Diapers arrived in 2 days. Therefore i went empty handed to the baby shower. Be warned Amazon Prime does NOT always deliver as stated.
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I’ve tried almost every brand on the market. I finally settled on these, and they are worth every penny. Here’s why they stand out: Absorbency: These are incredible for overnight. No leaks no late night changes Material & Feel: They are incredibly soft—almost like cloth. If your baby has sensitive skin or is prone to redness, the breathable material makes a huge difference. Fit: The leg cuffs are stretchy but secure. They dont leave that deep red marks that cheaper diapers do. Wetness Indicator: The line is clear and easy to see, even through a onesie. I bought a size 1 for my 9lb baby and it fits perfectly.
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Best diaper
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The only diaper band we ever buy. We’ve never had any blowouts because of it. It’s easy to use and hold up a lot. It’s really soft and doesn’t give any rashes. The material is great. Doesn’t really stop odor not that I expected it.
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D Lamb
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works great
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Pawtucket, US
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Perfect
Size: 60 Count (Pack of 1)
Excellent quality! No side effects except for great drowsiness with just 1. Take 2 if you need to dream! Good night 💤 Best melatonin I’ve ever had.
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Reviewed in the United States on March 15, 2026

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