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

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

Name: Holley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6
Brand: HOLLEY EFI
SKU: 650615115
Price: 1024.95 USD
Availability: InStock
Rating: 3 (1 reviews)

3 stars out of 1 review

(3.0)|

1 rating

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Key item features

Engine Compatibility: Designed for GM LS Gen III and IV engines with LS1/2/6 (cathedral port) cylinder heads, compatible with both OE and aftermarket heads.
Forced Induction: Optimized for supercharged or turbocharged applications, with peak power occurring between 7000-8000 rpm depending on the specific setup.
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, clearing 4th Gen Camaro and C5 Corvette cowls without modification.
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 model
LS1, 2, 6
Vehicle make
GM
Vehicle fitment type
Specific
Automotive parts division
Performance
Brand
HOLLEY EFI
Automotive specialty part type
Intake Manifold

Current price is $1,024.95

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Comparison Overview:
Product	Viewing this item Holley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6 current price $1,024.95 Holley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6 3 out of 5 Stars. 1 reviews	Holley EFI 558-513 EFI MPFI Harness Kits current price $972.95 Holley EFI 558-513 EFI MPFI Harness Kits	Holley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish current price $98.95 Holley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	Holley EFI 534-321 180 Degree Fuel Fitting Assembly - Black Finish current price $53.55 Holley EFI 534-321 180 Degree Fuel Fitting Assembly - Black Finish	Holley EFI 820241 Engine Intake Manifold current price $852.45 Holley EFI 820241 Engine Intake Manifold	Holley Performance 300-225 Engine Intake Manifold Bolt Set current price $86.64 Holley Performance 300-225 Engine Intake Manifold Bolt Set	Edelbrock Manifold LS7 Super Victor 4500 EFI current price $844.95 Edelbrock Manifold LS7 Super Victor 4500 EFI	Holley EFI 558-451 CAN Adapter Harness, 12 Inch current price $44.82 Holley EFI 558-451 CAN Adapter Harness, 12 Inch	Holley EFI 558-466 Weatherpak to GT (Stainless Steel) MAP Adapter Harness current price $47.24 Holley EFI 558-466 Weatherpak to GT (Stainless Steel) MAP Adapter Harness	Holley EFI 300-926BK Hi-Ram EFI Manifold Hardware Kit Coyote - Black Finish current price $46.20 Holley EFI 300-926BK Hi-Ram EFI Manifold Hardware Kit Coyote - Black Finish

Comparison Chart:
Vehicle model	LS1Holley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6	FoxbodyHolley EFI 558-513 EFI MPFI Harness Kits	CoyoteHolley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	CoyoteHolley EFI 534-321 180 Degree Fuel Fitting Assembly - Black Finish	LS1Holley EFI 820241 Engine Intake Manifold	‎300-225Holley Performance 300-225 Engine Intake Manifold Bolt Set	28905Edelbrock Manifold LS7 Super Victor 4500 EFI	LSHolley EFI 558-451 CAN Adapter Harness, 12 Inch	558-466Holley EFI 558-466 Weatherpak to GT (Stainless Steel) MAP Adapter Harness	CoyoteHolley EFI 300-926BK Hi-Ram EFI Manifold Hardware Kit Coyote - Black Finish
Vehicle make	GMHolley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6	FordHolley EFI 558-513 EFI MPFI Harness Kits	FordHolley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	FordHolley EFI 534-321 180 Degree Fuel Fitting Assembly - Black Finish	Chevrolet, Morris, RAMHolley EFI 820241 Engine Intake Manifold	Hi-RamHolley Performance 300-225 Engine Intake Manifold Bolt Set	ChevyEdelbrock Manifold LS7 Super Victor 4500 EFI	GMHolley EFI 558-451 CAN Adapter Harness, 12 Inch	-Holley EFI 558-466 Weatherpak to GT (Stainless Steel) MAP Adapter Harness	FordHolley EFI 300-926BK Hi-Ram EFI Manifold Hardware Kit Coyote - Black Finish
Vehicle fitment type	SpecificHolley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6	SpecificHolley EFI 558-513 EFI MPFI Harness Kits	SpecificHolley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	SpecificHolley EFI 534-321 180 Degree Fuel Fitting Assembly - Black Finish	SpecificHolley EFI 820241 Engine Intake Manifold	SpecificHolley Performance 300-225 Engine Intake Manifold Bolt Set	SpecificEdelbrock Manifold LS7 Super Victor 4500 EFI	SpecificHolley EFI 558-451 CAN Adapter Harness, 12 Inch	SpecificHolley EFI 558-466 Weatherpak to GT (Stainless Steel) MAP Adapter Harness	SpecificHolley EFI 300-926BK Hi-Ram EFI Manifold Hardware Kit Coyote - Black Finish
Automotive specialty part type	Intake ManifoldHolley EFI 300-621BK Holley Modular Lo-Ram EFI Manifold LS1/2/6	Engine HarnessHolley EFI 558-513 EFI MPFI Harness Kits	-Holley EFI 300-924 Ultra Lo-Ram Throttle Body Adapter Coyote - As Cast Finish	Fuel Line FittingHolley EFI 534-321 180 Degree Fuel Fitting Assembly - Black Finish	Engine Intake ManifoldHolley EFI 820241 Engine Intake Manifold	-Holley Performance 300-225 Engine Intake Manifold Bolt Set	Engine Intake ManifoldEdelbrock Manifold LS7 Super Victor 4500 EFI	EFI Can Adapter HarnessHolley EFI 558-451 CAN Adapter Harness, 12 Inch	-Holley EFI 558-466 Weatherpak to GT (Stainless Steel) MAP Adapter Harness	-Holley EFI 300-926BK Hi-Ram EFI Manifold Hardware Kit Coyote - Black Finish

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About this item

Product details

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

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)

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Specifications

Vehicle model

LS1, 2, 6

Vehicle make

Vehicle fitment type

Specific

Automotive parts division

Performance

Warranty

Warranty information

90 Days

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