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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
4.6 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 1
Used Disgusting Smelling Kurta Delivered
Color: Black, Size: XX-Large, Color: Black, Size: XX-Large
Sent me a used Kurta without pants. Disgusting
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
★★★★★ 5
Casual and comfortable
Great quality, soft and comfortable. The sleeves are a little longer than most, but the shirt is roomy enough to order a size smaller.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 28, 2025
★★★★★ 5
My Teen Son’s Favorite Shirt Right Now
This ended up becoming my teen son’s favorite shirt really quickly. He reaches for it all the time because it’s lightweight, comfortable, and easy to wear without feeling stiff or heavy.
The material feels soft with a little stretch to it, and it holds up nicely after washing without coming out wrinkled. It also has a clean look to it that works for casual wear but still looks a little more put together than a basic t-shirt.
It’s especially nice for warmer weather because the fabric breathes well and doesn’t feel clingy.
Overall, this was a really good buy and one of those shirts that gets worn constantly because it just fits and feels good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
★★★★★ 2
Very dark navy.
This is so dark it almost looks black when I received it. Not the color I thought it would be from the picture. Fit was good though for my son that is 6'2" and 275 pounds. Only returned because the color didn't work for family pictures.
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Reviewed in the United States on February 10, 2026
★★★★★ 4
Nice fall shirt
The material on this is great. Its soft and smooth. The fit is nice around the chest and stomach, although the sleeves seem a bit too long for me (I'm 5'9 and ordered the large). Its not very thick, so it's a nice early fall, late spring shirt. The only thing I don't like is that the fabric retains wrinkles. If this isn't hung up while warm, it will hold on to wrinkles
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 29, 2025
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