SKU: 88902945971

Holley LS1/LS2/LS6 Hi-Ram Intake Manifold - Black (HO300-123BK)

Sale price$1496.25 Regular price$1662.50
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Description

Holley LS1/LS2/LS6 Hi-Ram Intake Manifold - Black (HO300-123BK)HO300 123BK EFI HI RAM LS1 2 6 MANIFOLD Suit Single GM LS 102mm Throttle Bod Part Number: HO300 123BK 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

HO300-123BK - EFI HI-RAM LS1-2-6 MANIFOLD

Suit Single GM LS 102mm Throttle Bod

Part Number: HO300-123BK

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:
Base Plenum Top Mounting Flange Height - 8.42" to the lifter valley cover flange on engine block.
Total Height with 92/105mm EFI Plenum Top - 12.32" to the lifter valley cover flange on engine block.
Runner Length - 6.58", As-Cast Runner Cross-Sectional Area - Tapered 4.25 in² to 2.53 in²
Throttle Body Flange Location, with 92/102mm EFI Plenum Top : Height - 8.42" (from engine block lifter valley cover flange), Longitudinal Location - 3.84" (forward from engine block front flange), Angle - 25 deg. (down from vertical)
Plenum Top Gasket Type - 3/32" Round O-ring Cord
Mounting Flange Gasket Type - Standard LS3 Molded O-Ring
Port Size - 2.49" Height x 1.21" Wide

Shipping Notes
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Exchange/Return Notes
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SKU: 88902945971

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4.8 ★★★★★
Based on 26 reviews
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Verified Purchase
long islander
Los Angeles, US
★★★★★ 5
My Boston loves this fish toy
Color: Cyan NylonFish
Very durable. It takes a couple of months of intense chewing to make holes in this toy. My Boston has incredible mouth strength so he destroys most toys in minutes unless they are rocks. I have replaced this fish 2 times in the last year. I keep an eye on the wear and replace it when he makes a hole in it. Worthwhile purchase but monitor the dogs chewing.
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Reviewed in the United States on April 23, 2026
J
Verified Purchase
Jes
Belleville, US
★★★★★ 5
Great sturdy toy
Color: Cyan NylonFish
Great toy. 1 yr old puppy LOVES it! However, not good for TILE FLOORS. It's so strong and sturdy but bangs all over the tile! Enough to crack tiles 😬
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 27, 2025
E
Verified Purchase
Elizabeth Alfaro
San Leandro, US
★★★★★ 4
American Bully Trial - Honest Review
Color: Cyan NylonFish
I have never gotten a toy that lasted more than an hour when it comes to my baby girl. She is an aggressive chewer and loves anything that squeaks. This definitely helped to keep her entertained and use her teeth. I can confidently say that this toy may last a long time but she has already ripped a piece from it. I didn’t expect anything less since she always knows how to test new toys lol. I would definitely recommend though and will be getting more for her once this one is gone. Thank you!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 2, 2024
K
Verified Purchase
keyjustice
Los Angeles, US
★★★★★ 3
Hard, heavy, sharp
Color: Cyan NylonFish
This is very durable, but it is also very heavy (our dog likes to throw her toys) and after some chewing, the head and tail are very sharp
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Reviewed in the United States on April 25, 2026
B
Verified Purchase
BellaGi
Draper, US
★★★★★ 5
2 years later and it’s still going!
Color: Cyan NylonFish, Color: Cyan NylonFish
I have 2 dogs, a 6lb chihuahua (Lolli) and an almost 100lb German shepherd/Belgian Malinois (Uzi). Got this for Uzi, however, Lolli had other plans for it. She literally took it out her mouth and ran to hide it. It’s been over a year, closer to 2 and it’s still hanging on. Attached a photo of Lolli…
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026

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