Hero image 0 of Holley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6, 0 of 11

Holley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6

Name: Holley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6
Brand: HOLLEY EFI
SKU: 390813468
Price: 943.95 USD
Availability: InStock

5 stars out of 1 review

(5.0)|

1 rating

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Key item features

Engine Compatibility: Designed for GM LS Gen III and IV engines utilizing LS1/2/6 cathedral port cylinder heads, compatible with both OE and aftermarket heads.
Forced Induction: Optimized for forced induction applications (supercharged or turbocharged) with peak power typically occurring between 7000-8000 rpm.
Modular Design: Features a modular design that allows for a front-feed plenum entry, facilitating custom inlet duct and throttle body placement.
Low Profile: Engineered with a low overall height in the front-feed configuration to fit under stock or mildly modified hoods.
Vehicle Clearance: Provides clearance for 4th Gen Camaro and C5 Corvette cowls and hoods without requiring modifications.
Fuel System: Includes high-volume fuel rails with 3/4-16 o-ring ports (8 AN) and mounting hardware for both long and short fuel injectors.

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Specs

Vehicle make
RAM
Vehicle model
LS1, 2, 6
Vehicle fitment type
Specific
Brand
HOLLEY EFI
Material
Cast Iron
Automotive parts division
Performance

Current price is Now $943.95

You save $106.00

was $1,049.95

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Columbus, 43215

Arrives by Sat, Feb 21

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4.4071428571428575 stars out of 5, based on 280 seller reviews(4.4)

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Comparison Overview:
Product	Viewing this item Holley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6 current price Now $943.95, Was $1,049.95 Holley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6 5 out of 5 Stars. 1 reviews	Holley EFI 300-624 Dual Fuel Injector LS1 Lo-Ram Top-Feed EFI Intake Manifold Kit current price $1,197.95 Holley EFI 300-624 Dual Fuel Injector LS1 Lo-Ram Top-Feed EFI Intake Manifold Kit	Holley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base current price Now $736.95, Was $799.95 Holley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	Weiand 300-238 Engine Intake Manifold current price $247.95 Weiand 300-238 Engine Intake Manifold	Holley EFI 300-910 Hi-Ram EFI Intake Manifold Coyote - As Cast Finish current price $821.57 Holley EFI 300-910 Hi-Ram EFI Intake Manifold Coyote - As Cast Finish	Holley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit current price $727.96 Holley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	Holley 300-951 Holley Hi-Ram Front-Feed EFI Intake Manifold Kit - Small Block Chevy current price Now $921.95, Was $999.95 Holley 300-951 Holley Hi-Ram Front-Feed EFI Intake Manifold Kit - Small Block Chevy	Holley 300-679 Lo-Ram Intake Manifold Single Injector Satin Finish current price Now $874.95, Was $972.95 Holley 300-679 Lo-Ram Intake Manifold Single Injector Satin Finish	Holley Ultra Lo-Ram Manifold Kit - GM Gen V LT current price $1,014.95 Holley Ultra Lo-Ram Manifold Kit - GM Gen V LT	Holley Performance 300-207BK Engine Intake Manifold current price $306.95 Holley Performance 300-207BK Engine Intake Manifold

Comparison Chart:
Vehicle make	RAMHolley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6	GMHolley EFI 300-624 Dual Fuel Injector LS1 Lo-Ram Top-Feed EFI Intake Manifold Kit	FordHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	RAMWeiand 300-238 Engine Intake Manifold	FordHolley EFI 300-910 Hi-Ram EFI Intake Manifold Coyote - As Cast Finish	GMHolley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	GMHolley 300-951 Holley Hi-Ram Front-Feed EFI Intake Manifold Kit - Small Block Chevy	GMHolley 300-679 Lo-Ram Intake Manifold Single Injector Satin Finish	GMHolley Ultra Lo-Ram Manifold Kit - GM Gen V LT	RAMHolley Performance 300-207BK Engine Intake Manifold
Vehicle model	LS1Holley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6	LS Gen III and IVHolley EFI 300-624 Dual Fuel Injector LS1 Lo-Ram Top-Feed EFI Intake Manifold Kit	SBFHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	300-238Weiand 300-238 Engine Intake Manifold	CoyoteHolley EFI 300-910 Hi-Ram EFI Intake Manifold Coyote - As Cast Finish	LS1/2/6Holley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	-Holley 300-951 Holley Hi-Ram Front-Feed EFI Intake Manifold Kit - Small Block Chevy	LS Gen III and IV enginesHolley 300-679 Lo-Ram Intake Manifold Single Injector Satin Finish	Gen V LT1Holley Ultra Lo-Ram Manifold Kit - GM Gen V LT	300-207BKHolley Performance 300-207BK Engine Intake Manifold
Vehicle fitment type	SpecificHolley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6	SpecificHolley EFI 300-624 Dual Fuel Injector LS1 Lo-Ram Top-Feed EFI Intake Manifold Kit	SpecificHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	SpecificWeiand 300-238 Engine Intake Manifold	SpecificHolley EFI 300-910 Hi-Ram EFI Intake Manifold Coyote - As Cast Finish	SpecificHolley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	UniversalHolley 300-951 Holley Hi-Ram Front-Feed EFI Intake Manifold Kit - Small Block Chevy	SpecificHolley 300-679 Lo-Ram Intake Manifold Single Injector Satin Finish	SpecificHolley Ultra Lo-Ram Manifold Kit - GM Gen V LT	SpecificHolley Performance 300-207BK Engine Intake Manifold
Material	Cast IronHolley EFI 300-621 Holley Modular Lo-Ram EFI Manifold LS1/2/6	Cast IronHolley EFI 300-624 Dual Fuel Injector LS1 Lo-Ram Top-Feed EFI Intake Manifold Kit	Cast aluminumHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	Cast IronWeiand 300-238 Engine Intake Manifold	Cast IronHolley EFI 300-910 Hi-Ram EFI Intake Manifold Coyote - As Cast Finish	Cast IronHolley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	AluminumHolley 300-951 Holley Hi-Ram Front-Feed EFI Intake Manifold Kit - Small Block Chevy	Cast IronHolley 300-679 Lo-Ram Intake Manifold Single Injector Satin Finish	SatinHolley Ultra Lo-Ram Manifold Kit - GM Gen V LT	Cast AluminumHolley Performance 300-207BK Engine Intake Manifold

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About this item

Product details

Lo-Ram Manifold Kit - LS1/2/6 Front-feed;

The Holley LS1/2/6 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 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 in the front-feed configuration.
The 300-621 Lo-Ram front-feed 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.;

Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) 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-feed 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 Â3/4â€-16 o-ring ports (8 AN)

info:

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Compatible cars

4th Gen Camaro and C5 Corvette

Vehicle make

RAM

Vehicle model

LS1, 2, 6

Vehicle fitment type

Specific

Warranty

Warranty information

90 Days

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warranty url

https://www.nosoemparts.com/pages/returns

Warnings

Warning Text

California Proposition 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.com

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