SKU: 89939565797

Holley LS1/LS2/LS6 Hi-Ram Intake Manifold - Black (HO300-227BK)

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Description

Holley LS1/LS2/LS6 Hi-Ram Intake Manifold - Black (HO300-227BK)HO300 227BK EFI HI RAM BASE ONLY LS1 LS2 Manifold Base Only Suit EFI Application Part Number: HO300 227BK 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

HO300-227BK - EFI HI-RAM BASE ONLY LS1 LS2

Manifold Base Only Suit EFI Application

Part Number: HO300-227BK

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

Shipping Notes
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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.
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SKU: 89939565797

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4.4 ★★★★★
Based on 19 reviews
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Product Reviews
A
Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Works perfectly!
Color: Black, Color: Black
I was replacing my old one (Acer) because it would glitch out sometimes and not work how it should and I would have to mess with it to get it to work, I have an external keyboard, mouse and monitor for my MacBook Air and the dongle was perfect, I was able to plug everything in and it worked right away, with no problem!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
J
Verified Purchase
Junior Segura
Battle Creek, US
★★★★★ 5
Very good hub and great customer support.
Color: Space grey
I've been using this Hiearcool USB-C hub with my MacBook for work and daily use, and it does exactly what it promises. All the ports work well (HDMI, USB, SD card, and charging), and it's very convenient for office and travel. At one point, I had an issue under regular use and contacted their support. They were responsive and helpful, and they assisted me quickly with a solution, which I really appreciated. Overall, it's a solid hub for the price, reliable, and backed by good customer service. I'd definitely recommend it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2026
A
Verified Purchase
Ari G.
Lexington, US
★★★★★ 4
NOKIA OF USB C HUBS
Color: Space grey
Howdy y’all, the only reason I’m doing a four star review is to keep it real. The only annoying thing with the adapter when you plug it in kind of flops goes all over the place, but that is easily remedied by how useful it is. I’ve worked at Best Buy. I study software. I like my tech to be reliable and last, this adapter has not disappointed me the last almost 4 years now! It looks the same as pictured, maybe a couple scratches now but it has held up incredibly well. I initially got so I can connect my monitor and my mouse to my MacBook Pro and that continues to be my main use for it. I’ve discovered it also works great at connecting to my iPad Air for extending the screen, mirroring, or using my mouse. It also works great for transferring data to other USB-C compatible devices like a Samsung phone! This thing has been reliable, I’ve used it to connect to external storage drives, SD cards, microSD cards. I keep finding new uses for it. It practically lives in my work bag all the time now. Also, I’ve only had it get somewhat warm like probably 2-3 times in my entire time of using it. The reason I come back to review after all these years is my younger sibling asked if they could have my adapter and I’ve never felt so firmly in saying absolutely not. I’m grateful that you can still buy this because a lot of things I’ve purchased on Amazon haven’t lasted. When you find something good like this, especially in this day where things are built to break, you can’t help but appreciate the things that are reliable and consistent.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
J
Verified Purchase
Jeff & LaToya
Waukegan, US
★★★★★ 5
Outstanding device
Color: Space grey
I use this instead of a docking station, it works extremely well on my HP laptop.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
P
Verified Purchase
Pat OBrien
Lowell, US
★★★★★ 5
Good addition to a MacBook Pro
Color: Space grey
Works great, adds a lot of versatility to my laptop.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026

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