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Description
Hi-Ram Lower Manifold - GM LS1/LS2/LS6 Cathedral Port EFI Base Only-BlackHolley Hi Ram Lower Manifold GM LS1 LS2 LS6 LS1 LS2 LS6 Cathedral Port EFI Base Only 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
Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6LS1/LS2/LS6 Cathedral Port EFI Base Only
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.
These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration.
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 in?? to 2.53 in??
- Black
Details:
- Color: Black
- Construction: Cast
- Engine: GM LS1/LS2/LS6
- Finish: Black
- Fuel System Type: EFI
- RPM Power Band: 3500-8000 RPM
- Type of Component: Lower Manifold
- Warranty: Limited 90 Day
Links
300-227
Instruction Sheet
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
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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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 1
💔My dogs are throwing up and diarrhea BLOOD!
Size: Whole Ears (Pack of 22)
Salmonella
I have 5 dogs. On Thursday, July 17, I received a package of pig ears from this company. This was not the first time my dogs had pig ears but it was the first time I purchased from you. My dogs were each given a pig ear. Within 24 hours, all of my dogs were throwing up and diarrhea. By Saturday, all 5 of my dogs were throwing up straight blood and diarrhea straight blood!!! Puddles! It was horrifying and looked like a crime scene in my house!!! My husband and I were hysterical! My dogs were so weak and lethargic, and sick! 4 of my dogs are under 10lbs and were in the emergency vet getting an IV and fighting for life, as well as my 10 year old American Staff rescue who has a weak immune system because she fought heartworms a year and a half ago before we adopted her. It is currently Monday morning and our nightmare hasn't ended! My husband and I, both work, and have literally not slept since! 24 hours a day we are cleaning up after dogs - vomit, diarrhea, and tons of it! From each! Last night my smallest dachshund threw up 16 times in 15 minutes - on my bed, lap, floor, everywhere! Blood! We are torn- are lives are shattered! In the blink of an eye all because we thought we were spoiling our dogs and giving them a treat! Now they are fighting for life! We have spent thousands at the emergency vet for all of them! We still don't know if they are going to make it! We are so devastated and feel so helpless watching them! We try to console them but how do you console all 5 at once and what do you do when they don't understand & they are so weak and miserable and blood is coming out of their bodies faster than you can clean it! I think it is important for people to be aware! After researching, I found out that this company had a salmonella outbreak across 45 states in 2019.
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Reviewed in the United States on July 25, 2025
★★★★★ 5
Good value
Size: Half-cut (Pack of 50)
Pups love them
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Reviewed in the United States on April 19, 2026
★★★★★ 3
Dogs love them but they are small.
Size: Half-cut (Pack of 50), Size: Half-cut (Pack of 50)
They are good quality but probably shouldn’t be marketed toward medium size dogs. A good portion of them are very small which is disappointing.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Bouncy, not hard, and good value.
Style: Fetch Balls (Pack of 10), Size: 2.5 inch
Great balls for the ball launcher and not rockhard like some of the solid rubber balls. These have great bounce, and because of the two holes, they make a fun whistling noise as they fly through the air. My dogs love them and they are a good value.
By the way, if you throw them too hard, they will go through chain-link and no climb fence because they squish a bit!
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Excellent dog balls — safe design and very durable
Style: Fetch Balls (Pack of 3), Size: 2.5 inch
These fetch balls from Amazon Basics are fantastic, and my dog absolutely loves them. One of the biggest reasons I prefer these over other brands is the hole that runs through the center of the ball. This is a very important safety feature: if a dog were to accidentally get the ball stuck in the back of the throat, the hole allows air to pass through. That small detail could literally make a life-saving difference.
Aside from the safety benefit, they bounce well, are easy to clean, and hold up to a lot of playtime. They’re firm but not rock-hard, and my dog goes crazy for them. Great value, great quality, and a thoughtful design.
Highly recommended for dog owners who want a safer alternative to standard solid rubber balls.
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Reviewed in the United States on December 1, 2025