SKU: 68293768474

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

Sale price$472.48 Regular price$524.98
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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

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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:
  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: 68293768474

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Erick Naples
New York, US
★★★★★ 5
Nothing goes wrong with UA
Size: X-Large, Color: White
Nice and comfortable for easy wear. Great offer for this price and hope this work for many as it did for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
J
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Jason J Bouchard
Pawtucket, US
★★★★★ 5
They look just like the photo...fit and feel great!
Size: Large, Color: White/Gray (6 Pairs)
No complaints on these. They fit great, are supportive cotton, and look great. I was so used to the cheap Wal-Mart-bought fruit of the loom (think) ankle socks that I had no idea what I was missing. These are thicker, made better, and feel great. They even support the back of your foot from riding against your shoes. Because they are a bit thicker, they do make my feet hotter than before...but I've adjusted the shoe I wear to allow more breathability and don't wear them for long periods anyway. I live in Texas...we wear flip flops most of the year round. :)
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Reviewed in the United States on June 1, 2020
D
Verified Purchase
Dave Saladin
Lexington, US
★★★★★ 5
Love Underarmour!
Size: Large, Color: White (6-pairs)
Why did you pick this product vs others?: Love underarmour products!  Very comfortable.  Love them for golf season. 
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 18, 2025
L
Verified Purchase
Local egg dealer
Lexington, US
★★★★★ 4
Run large
Size: Large, Color: White/Gray (6 Pairs)
They seemed larger than the last time I ordered. I should have ordered medium
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Reviewed in the United States on March 14, 2025
M
Verified Purchase
Mario
Chelsea, US
★★★★★ 5
Love these socks! They are absorptive, comfortable, supportive, attractive & great fitting!
Size: Medium, Color: White/Gray (6 Pairs)
These have been my go-to socks for almost 8 years now. I love that they are cotton, so they absorb sweat rather than give you that slimy feel you can get from polyester. They have great support in the mid foot and fit great due to the sizing. Just the right amount of padding and exhibiting an attractive low cut below the ankles. I highly recommend these socks. I hope this is helpful.
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Reviewed in the United States on October 18, 2022

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