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Description
Holley 300-122 LS HI-Ram EFI ManifoldLS1 2 6 HI RAM IM, EFI, 92MM LS TB 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
LS1/2/6 HI-RAM IM, EFI, 92MM LS TB
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
Application
- 1953-2019 Chevrolet Corvette
- 1964-2019 Pontiac GTO
- 1966-2019 Chevrolet Camarro
Specs
| Brand | Holley EFI |
|---|---|
| Color | Aluminum |
| Construction | Cast |
| Emission Code | 3 |
| Engine | GM LS1/LS2/LS6 |
| Finish | Satin |
| Flange Style | EFI |
| 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 | 300-122 |
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
4.0 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 3
Weird taste...and no fizz....
I presume these do what they are meant to do...replenish electrolytes (although how completely you need replenishing, meaning needing other minerals besides what are in these Idk)
However, the whole reason I would not repurchase is the taste is ...OFF. For some its not that strong, but for me its TOO strong, I want a subtler lemon lime taste (or any other flavor) basically a sugarless Sprite taste. And if you're looking for fizz to truly make it a flavored seltzer water experience, Nope.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
★★★★★ 5
Tastes good
They have a good taste and I like the fizzy part.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2026
★★★★★ 4
Taste good!
Taste good!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
★★★★★ 5
Awesome product!
MicroIngredients has done it again! While they don't taste great, they are tolerable. I'm confident this will help replenish any nutrients I may be missing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 30, 2025
★★★★★ 1
Bad taste
Nasty taste, really sweet
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2026
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