SKU: 59839583273

Holley LS1/LS2/LS6 Ultra Lo-Ram EFI Intake Manifold, Black Finish (HO300-621BK)

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Description

Holley LS1/LS2/LS6 Ultra Lo-Ram EFI Intake Manifold, Black Finish (HO300-621BK)HO300 621BK BLACK HOLLEY MODULAR LO RAM Suit Single GM 105mm Throttle Body Part Number: HO300 621BK The Holley LS1 2 6 Ultra Lo Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1 2 6 (cathedral port) cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Ultra Lo Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications and the

HO300-621BK - BLACK HOLLEY MODULAR LO-RAM

Suit Single GM 105mm Throttle Body

Part Number: HO300-621BK

The Holley LS1/2/6 Ultra Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Ultra Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications and the 105 mm throttle body part number 112-581 or similar models. The base intake manifold is designed with a lower overall height to fit under a stock or mildly modified hood. 
The 300-621 Lo-Ram plenum entry was configured to provide a very low profile modular intake manifold suitable for turbocharged or centrifugally supercharged engines. 
The fuel rail kits come with two sets of brackets. A set for long (usually standard length) fuel injectors and a set for short (such as Pico, or LS7) fuel injectors.
Features:
Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral cylinder heads
Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application.
With forced-induction and the short runner length the engine rpm at which peak power occurs is more likely to be coupled to the supercharger or turbocharger being used
Modular design allowing the use of front-feed plenum entry

Intake design facilitates custom inlet duct and throttle body placement

Low height to fit under a stock or mildly modified hood in the front configuration
Front entry plenum flange allows design & fabrication of special throttle body adapters or inlet ducts for custom installations
Clears 4th Gen Camaro and C5 Corvette cowls and hoods without modification
High volume fuel rails and mounting hardware included with ¾”-16 o-ring ports (8 AN)

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SKU: 59839583273

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linda devine
Birmingham, US
★★★★★ 5
Excellent
Format: Hardcover
Excellent reading and colorful
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Reviewed in the United States on November 15, 2025
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Linda
Lexington, US
★★★★★ 5
Wonderful book for Children
Format: Kindle
Great read and lots of great lessons for children and wonderful illustrations. Very well written. I highly recommend this book.
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Reviewed in the United States on July 12, 2025
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Sunset Slacker
West Palm Beach, US
★★★★★ 5
Wonderful depiction of the city & finding gratitude
Format: Hardcover
I bought this book after moving my young family from SF to a very homogeneous suburb. Rode MUNI with my kids & at the time didn’t realize how diversity is taught passively when it’s all around you. Fast forward, my kiddo makes a comment in preschool that shocks me & realize that she’s now in such a bubble. This book is clearly nostalgic for me, but for my kids it’s a chance to talk about all the different lives people live. A chance to talk about race, culture, homelessness, privilege (riding the bus instead of a car, not having a music player), people with disabilities, etc. To those who choose to post about the grammar In this book, good authors work very hard on depicting dialects, which are 100% a part of one’s culture. Take the opportunity to discuss the diversity that exists in language too. My goodness, white people from Boston add & delete Rs like crazy (Cubar instead of Cuba, ca’ instead of car). 🙃
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Reviewed in the United States on August 5, 2020
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me
Whiting, US
★★★★★ 5
Great story and wonderful pictures
I’ve been trying to find books my son (6) would enjoy reading. He's asked me to read this one to him every night for like a week now. It’s a sweet story and the illustrations are beautiful. I’m really glad I bought it.
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Reviewed in the United States on September 3, 2025
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Del Mar
Natrona Heights, US
★★★★★ 4
nice but not preschool
Format: Hardcover
nice but not for preschool, perhaps older children to really understand the content
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Reviewed in the United States on December 30, 2025

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