SKU: 59839583273

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

Sale price$1087.65 Regular price$1208.50
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Ships within 48 hours · Estimated delivery Sep 22 - Sep 27

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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)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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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]
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SKU: 59839583273

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4.1 ★★★★★
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Verified Purchase
Denis
Whiting, US
★★★★★ 4
Good light, but blinding
Size: H7
The light itself is good and bright and fits well, but I don't know if I installed it wrong, but the driver's side is very blinding, and I feel bad for other drivers and can't do anything about it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
M
Verified Purchase
Melissa Aguilera
Charlottesville, US
★★★★★ 5
Best product for truck
Size: H11+9005-100,000LM
Works great and very bright
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
C
Verified Purchase
Codie Garee
New York, US
★★★★★ 4
Easy to install, extremely crisp and bright
Size: H7
My H7 Termitor Headlights are wonderful for my 2014 VW Jetta SE 1.8l turbo. Extremely bright and super easy to install since they have the exact fitting as the factory bulbs. Only thing I would have done differently is to use the adapter to maintain steady light. Whenever I'm in gear or roll the windows up or down I can see the lights dim and after I drive for a while they aren't as bright as when I first started the car. Otherwise they are great, very bright, no warm up time, and clean crisp light. They're even brighter than my factory brights (which I still have installed with the factory bulbs, can't even tell they're on with these!)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2026
C
Verified Purchase
carmen d banks
San Leandro, US
★★★★★ 5
Retainer clips
Style: 121PCS Clips with Tool for Nissan/Infiniti
Worked very well for my car. I was able to select the right ones to snap my liner under the car back up
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
W
Verified Purchase
wayne
Waukegan, US
★★★★★ 5
Various types of clips was handy
Style: 121PCS Clips with Tool for Honda/Acura
Variety of clips was nice and the tool worked great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026

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