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Description
Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6 300-227BKThe Holley GM LS1 LS2 LS6 Modular Hi Ram Intake Manifold is introduced as an 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,
The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as an 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 for 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 with max power at 7000-8000+RPM
Features:
- Port Size - 2.49Ó H x 1.21Ó W
- Mounting Flange Gasket Type - Standard LS3 Molded O-ring
- Plenum Top Gasket Type - 3/32Ó Round O-ring Cord
- Runner Length - 6.58Ó As-Cast Runner Cross-Sectional Area - Tapered 4.25 in_ to 2.53 in_
- Black color
About Holley EFI
Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!
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
4.4 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Dog toy
Color: Red Lobster
My puppie loves it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
★★★★★ 5
Great play toy
Color: Red Lobster
My dogs loved this toy. Played with for several days. Rug of war pulled it apart.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Great toy
Color: Red Lobster
I bought them as gifts for Christmas. Bothe dogs loved this.
It is quite sturdy also
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Reviewed in the United States on April 9, 2026
★★★★★ 1
Indestructible my shiny hiney!! Dog had it destroyed in 6 hours. Waste of $$$
Color: Blue Cow
I bought this blue buffalo dog stuffy toy for my medium sized dog. It says it is for "heavy chewers" and she really isn't a heavy chewer. My German shepherd was a heavy chewer. This little dog isn't. So this toy should have lasted her a couple of weeks at best.
NOPE! NOT EVEN CLOSE!!
She had it for about 6 hours before the seams were busting open and stuffing scattered all over my house. 6 FREAKING HOURS!!!
I'm very upset over this and my son threw it away before I could tell him to let me return it. So that's $6.99 down the drain.
Indestructible my ass. Waste of money and lots of lies on the page. Phooey!
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Reviewed in the United States on September 8, 2025
★★★★★ 5
Dureza
Color: Blue Cow
Excelente producto y realmente duradero y resistente para perros
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Reviewed in the United States on May 3, 2026