Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 - 300-227BK
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:
  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: 684123817

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T. Kobialka
Chelsea, US
★★★★★ 5
Fits the lanky teen!
Color: Burgundy, Size: 3X-Small
Nicer than expected. I really appreciate them carrying auper-slim sizing for my tall, skinny teen who can't find suits that don't have a >32" or larger waist. He has a 22" waist.he still needed a belt, but the xxxs fit him well across the shoulders and in length!
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Reviewed in the United States on May 26, 2026
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Amazon Customer
Cuba, US
★★★★★ 5
Nice Suit
Color: Black, Size: Large
I wasn't sure how well it would fit, but it fit well. The pants are stretchy, and a little shorter than I wanted. But it looks really nice and I got a lot of complements on it for New Year's Eve. I wish they would let you mix and match the suit jacket and pants.
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Reviewed in the United States on January 5, 2026
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BK
Whiting, US
★★★★★ 5
Nice and sturdy fabric!
Color: Black, Size: XX-Large, Color: Black, Size: XX-Large
This is a very nice suit with sturdy fabric. I am a plusize female so I sized up since I thought it was cut for a male. It fit perfectly but arms needed hemming. I purchased it for a Great Gatsby theme event, but will wear it as I do any other suit in my wardrobe.
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Reviewed in the United States on April 18, 2026
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Felecia McCall
Boise, US
★★★★★ 5
Spiffy suit for any age.
Color: Black, Size: Large, Color: Black, Size: Large
I purchase this suit for my son's high school fraternity show. He said that it was very comfortable, not to mention my son looked very handsome and daper in it. I love how fast it was shipped and the size was on target.
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Reviewed in the United States on January 3, 2026
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Tim Smith
Belleville, US
★★★★★ 4
Good quality throughout.
Color: Blue, Size: X-Large
Good packaging.
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Reviewed in the United States on December 8, 2025

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