SKU: 557473057

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.
  • 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: 557473057

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4.7 ★★★★★
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Verified Purchase
spencer
Whiting, US
★★★★★ 5
Would buy again very durable
Color: Mixed Blue
My dog is a super chewer and I got this for her for christmas and she still has it :D Would buy again,.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
M
Verified Purchase
machon e.
Belleville, US
★★★★★ 5
Almost indestructible
Color: Mixed Blue
So far my toy destroying pup hasn't destroyed this one. He tears Kong toys up in hours. Does it look pretty no lol ita been buried and thrown and chewed for months.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
B
Verified Purchase
Bob Hammett
Louisville, US
★★★★★ 1
Not for aggressive chewers
Color: Mixed Blue
I purchased 2. The Rubber in the middle was chewed through in an hour by american bullys. Not for aggressive chewers. They are not interested in them anymore.
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Reviewed in the United States on June 6, 2026
D
Verified Purchase
Dave A.
Grantham, US
★★★★★ 3
Harder and heavier than a dog toy should be, but it is sturdy.
Color: Mixed Blue
The outer rim is a very hard plastic, hard enough to dent and ding furniture. Too hard to throw in the house. Dog likes it but has difficulty getting his mouth around the sides as the item is very heavy for its size. Squeaker in the middle was a a nice surprise. Would not buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
V
Verified Purchase
Vicky Courtright
Fort Morgan, US
★★★★★ 4
Durable and well made.
Color: Mixed Blue
Our dog will chew any toy up in 2.5 seconds. This has lasted for quite some time. It's super hard which can be a downfall because they lose interest. Squeeker is hard to push down but overall it's outlasted other toys.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026

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