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Description
Holley 300-122BK LS HI-Ram EFI Manifold- BlackLS1 2 6 HI RAM IM, EFI, 92MM LS TB BLACK 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,
LS1/2/6 HI-RAM IM, EFI, 92MM LS TB-BLACK
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:
- Base Plenum Top Mounting Flange Height – 8.42” to the lifter valley cover flange on engine block.
- Total Height with 92/102mm EFI Plenum Top – 12.32” to the lifter valley cover flange on engine block.
- 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
- Throttle Body Flange Location, with 92mm 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)
- Runner Length – 6.58”, As-Cast Runner Cross-Sectional Area – Tapered 4.25 in² to 2.53 in²
Specs
| Brand | Holley EFI |
|---|---|
| Color | Black |
| Construction | Cast |
| Emission Code | 3 |
| Engine | GM LS1/LS2/LS6 |
| Finish | Black |
| Front Height | 12.32 inch |
| Fuel System Type | EFI |
| Manifold Type | Hi-Ram |
| Product Type | Manifold |
| Rear Height | 11.00 inch |
| RPM Power Band | 1500-7000 |
| Warranty | Limited 90 Day |
| Part Number | 300-122BK |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.5 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Must buy!
Color: Dark Brown, Size: 15.7 inch
Very nice and sturdy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 5
Stylish and Practical Storage Solution
Color: Black, Size: 15.7", Color: Black, Size: 15.7"
Love these floating shelves! They are sturdy, easy to install, and perfect for adding extra storage in the bathroom.
I used them over the toilet and they fit perfectly. They helped me organize essentials while also making the space look more modern and put together.
Great quality and very functional. Highly recommend for small bathroom upgrades!
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Loved it!
Color: Black, Size: 15.7"
These floating bathroom shelves are exactly what I was looking for. They’re sturdy, well-made, and look really nice once mounted. Installation was straightforward, and all the necessary hardware was included. The shelves hold a good amount of weight and are perfect for organizing bathroom essentials without taking up floor space. They add a modern, clean look to my bathroom and make it feel more organized. Great quality for the price — I’d definitely recommend these to anyone needing extra storage.
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Reviewed in the United States on January 24, 2026
★★★★★ 5
Easy install
Color: Black, Size: 15.7", Color: Black, Size: 15.7"
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I recently installed these bathroom shelves, and they completely exceeded my expectations. The quality feels solid and durable, and once mounted, they sit perfectly level without any wobble. I love how clean and modern they look — they instantly elevated the whole feel of the bathroom.
The shelving space is surprisingly generous. I’m able to store everything from toiletries to décor pieces without the shelves feeling cluttered or overloaded. The finish also holds up well in humidity, which is a big deal for a bathroom environment.
Installation was straightforward, the hardware included worked perfectly, and the shelves feel like they’re built to last. Overall, these shelves deliver both style and function, and I’m extremely pleased with how they turned out.
Highly recommended if you want a simple upgrade that makes a big impact.
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Reviewed in the United States on February 22, 2026
★★★★★ 4
Looks like photos!
Color: Black, Size: 15.7", Color: Black, Size: 15.7"
Good quality, looks like photo! Pretty easy to install had a little hard time hanging but other wise great! Use 2 shelf’s in one spot and other in another spot!
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Reviewed in the United States on April 29, 2026