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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kate pazanin
Massapequa, US
★★★★★ 5
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Pattern Name: Elegant(12 Sets)
Exactly what I needed
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Reviewed in the United States on April 23, 2026
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I got these to use for Halloween. They were a big hit and oh so very pretty. We all love them and there’s so many to choose from.
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Reviewed in the United States on November 11, 2025
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az
Phoenix, US
★★★★★ 5
Looks fun
Pattern Name: Graceful(12 Sets)
Will use these for Mardi Gras. Colors are great.
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Reviewed in the United States on February 13, 2026
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Yennifer
New York, US
★★★★★ 5
Yes yes yes! Low calorie w/ no garbage ingredients
Size: 1 lbs
I am super picky when it comes to dog treats. Do my research and this treat has proven to be a great find for my pup. The minimal ingredient list is fantastic and there is no crap that shouldn’t be there. They are smaller pieces but look fresh and my dog cannot get enough! They are low calorie and great alternatives to other treats sold with fillers and chemicals that harm our fur babies! Highly recommend these. My dog eats them with vigor! Healthy snacks!
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Reviewed in the United States on December 26, 2025
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Gabrielle Gargala
Belleville, US
★★★★★ 5
Great one ingredient treats
Size: 1 lbs
I love that these are one ingredient treats. The quality is great, my dogs love the taste, and their appearance looks great without a bunch of additives. The texture is nice and the ridges in the cuts do help with cleaning my dogs teeth a bit. They are fairly expensive for what they are. These are great if you don’t have the time to make your own.
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Reviewed in the United States on January 5, 2026

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