Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227
SKU: 72630605196

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

Sale price$427.48 Regular price$474.98
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Description

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

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley EFI
Color Natural
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.
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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: 72630605196

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4.8 ★★★★★
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Product Reviews
L
Verified Purchase
Lisa Marie 1971
Louisville, US
★★★★★ 5
Awesome Spice Rack!
Size: 2 Tier-13.5''Wx10.5''Dx9.5''H
This works perfectly. I bought two as I have a lot of spices. Do need to remember that the height needed for unit is 9 inches, but with full size spice jars on top rack, you need at least 11 inches. Otherwise it works great. Smooth movement of the drawers. Very sturdy and stable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
G
Verified Purchase
Greg Phillips
Battle Creek, US
★★★★★ 4
A good value, works well.
Size: 1 Tier-8.5''Wx10.5''Dx2.5''H, Size: 1 Tier-8.5''Wx10.5''Dx2.5''H
It works great, and a good value for the price. Super easy to install, comes with a template (you probably wont need), screws and a screw driver. Easy peasy It will not affect the performance, but it is a little flimsy. Great service and price. Quality packaged as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
M
Verified Purchase
m
Louisville, US
★★★★★ 5
Great quality product
Size: 2 Tier-5.5''Wx10.5''Dx9.5''H
The product quality is great. Assembly is needed but relatively easy. The moving shelves have a premium slide and catch at the end. I was impressed by this the most. The only potential small issue were the inside protectors it came with. Not that they're poor quality, they have a decent thickness. But during assembly they kept falling out easily because there wasn't enough catch on the shelf itself. In actual stationary use, this may not be an issue. But would have been better if the shelf held onto them more. You may not notice it when you put things on the shelf on top if it but they're also not a great color/texture match. Semi-opaque white plastic on a black metal rack; it cheapens the product. And in case you were wondering, magnets can stick to it. Overall though, I am pleased with the quality of this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 26, 2025
D
Verified Purchase
D. va
Boise, US
★★★★★ 5
Great spice organizer really helpful
Size: 2 Tier-9.5''Wx10.5''Dx9.5''H
I love this spice organizer
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
T
Verified Purchase
Teresa
San Leandro, US
★★★★★ 5
Organizing the mess
Size: 2 Tier-11.5''Wx10.5''Dx9.5''H
Easy to install. Organizes my spice cabinet and looks so much better. Seems quite sturdy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026

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