Hero image 0 of Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6, 0 of 11

Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6

Name: Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6
Brand: Holley
SKU: 612256747
Price: 749.95 USD
Availability: InStock

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Key item features

Dominator Flange: Features a 4500 Dominator flange race design, optimized for hood clearance and compatible with carburetors, EFI throttle bodies, or EFI throttle body elbows.
Split Design: Incorporates a two-piece split design for simplified porting and modification, with shoulder bolt locators and O-ring seals for precise assembly and disassembly.
Engine Compatibility: Designed for GM LS Gen III engines with cathedral port heads, specifically compatible with LS1, LS2, and LS6 models.
Vacuum Ports: Includes multiple NPT vacuum port options: two 1/8", one 1/4", and one 3/8" port at the carb flange, plus an LS MAP sensor port.
Performance Focus: Engineered for high-performance and racing applications, suitable for 5.3 to 6.2+ liter displacements, both naturally aspirated and with power adders.
RPM Optimization: The large volume 4500 plenum and optimized runners are designed to maximize power at 7500-8000+ RPM.
Fuel System: The EFI version includes billet fuel rails and mounting hardware, with AN-8 fuel rails.

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Specs

Compatible cars
LS1/LS2/LS6
Vehicle make
GM
Vehicle model
LS1, LS2, LS6
Vehicle fitment type
Specific
Brand
Holley
Material
Cast Iron

Current price is $749.95

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About this item

Product details

Compatible with LS1/LS2/LS6 Cast Finish with Fuel Rails;

The new Holley Single-Plane Race intake manifold is designed with maximum performance in mind. Featured is a two-piece split design that provides access for all levels of porting and modification. With shoulder bolt locators and O-ring seal, disassembly & reassembly is simple and precise.

The manifold with AN-8 fuel rails fits GM LS Gen III engines with cathedral port heads and has a 4500 Dominator style carb flange for carburetors, EFI throttle bodies, or EFI throttle body elbows, and is configured with a LS MAP sensor port along with other NPT plenum vacuum or air-temp sensor ports.

The LS Race single-plane intake manifold is designed for hi-performance/racing engine applications, 5.3 to 6.2+ liter displacements, N/A or with power adders. The large volume 4500 plenum and optimized runners provide airflow potential for Hi-RPM engines with max power at 7500-8000+ RPM.;

Maximum performance 4500 Dominator flange race design with hood clearance consideration
Lighter than other split race intakes
Split feature making porting efforts easy!
33 to 50% the price of other split race intakes
Captured O-ring seals at head ports and plenum split
Vacuum Port options include (2) 1/8, (1) 1/4, and (1) 3/8, NPT ports at the carb flange
Two versions available: EFI type - Billet Fuel Rails and rail mounting hardware included, or Carbureted / Sniper EFI 4500 TBI style

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

LS1/LS2/LS6

Vehicle make

Vehicle model

LS1, LS2, LS6

Vehicle fitment type

Specific

Warranty

Warranty information

Manufacturer's Limited 90 Day Warranty

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.

Warnings

Warning Text

California Proposition 65

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

Compare with similar items

Comparison Overview:
Product	Viewing this item Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6 current price $749.95 Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6	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 300-291BK Single Plane Split-Design Race Intake Manifold current price $749.95 Holley 300-291BK Single Plane Split-Design Race Intake Manifold	Holley 300-940 Gen V LT Single Plane Intake Manifold - Fits Chevy LT current price $460.95 Holley 300-940 Gen V LT Single Plane Intake Manifold - Fits Chevy LT	Holley 300-295 Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6 current price $767.95 Holley 300-295 Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	Holley 300-295BK Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6 current price $799.95 Holley 300-295BK Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	Holley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base current price $819.95 Holley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	Holley 300-290 Holley Single Plane EFI Split-Design Race Intake Manifold- GM LS3/L92 current price $749.95 Holley 300-290 Holley Single Plane EFI Split-Design Race Intake Manifold- GM LS3/L92	Holley Performance 300-133BK Engine Intake Manifold current price $529.95 Holley Performance 300-133BK Engine Intake Manifold	Holley 300-670 Lo-Ram Intake Manifold Base Single Injector Satin Finish current price $665.95 Holley 300-670 Lo-Ram Intake Manifold Base Single Injector Satin Finish

Comparison Chart:
Compatible cars	LS1/LS2/LS6Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6	-Holley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	-Holley 300-291BK Single Plane Split-Design Race Intake Manifold	Chevy LTHolley 300-940 Gen V LT Single Plane Intake Manifold - Fits Chevy LT	LS1/LS2/LS6Holley 300-295 Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	LS1/LS2/LS6Holley 300-295BK Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	8.2 in. SBF FordHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	-Holley 300-290 Holley Single Plane EFI Split-Design Race Intake Manifold- GM LS3/L92	-Holley Performance 300-133BK Engine Intake Manifold	-Holley 300-670 Lo-Ram Intake Manifold Base Single Injector Satin Finish
Vehicle make	GMHolley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6	GMHolley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	GMHolley 300-291BK Single Plane Split-Design Race Intake Manifold	ChevyHolley 300-940 Gen V LT Single Plane Intake Manifold - Fits Chevy LT	GMHolley 300-295 Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	GMHolley 300-295BK Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	FordHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	GMHolley 300-290 Holley Single Plane EFI Split-Design Race Intake Manifold- GM LS3/L92	GMHolley Performance 300-133BK Engine Intake Manifold	GMHolley 300-670 Lo-Ram Intake Manifold Base Single Injector Satin Finish
Vehicle model	LS1Holley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6	LS1/2/6Holley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	LS Gen III or IVHolley 300-291BK Single Plane Split-Design Race Intake Manifold	LTHolley 300-940 Gen V LT Single Plane Intake Manifold - Fits Chevy LT	LS1Holley 300-295 Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	LS1Holley 300-295BK Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	SBFHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	LS Gen III or IVHolley 300-290 Holley Single Plane EFI Split-Design Race Intake Manifold- GM LS3/L92	LS Gen III or Gen IVHolley Performance 300-133BK Engine Intake Manifold	LS Gen III and IV enginesHolley 300-670 Lo-Ram Intake Manifold Base Single Injector Satin Finish
Vehicle fitment type	SpecificHolley 300-294 Single Plane EFI 4500 Split-Design Race Intake Manifold- GM LS1/LS2/LS6	SpecificHolley EFI 300-623 LS1 Lo-Ram EFI Front-Feed Manifold Kit	SpecificHolley 300-291BK Single Plane Split-Design Race Intake Manifold	UniversalHolley 300-940 Gen V LT Single Plane Intake Manifold - Fits Chevy LT	SpecificHolley 300-295 Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	SpecificHolley 300-295BK Single Plane 4500 Carbureted Split-Design Race Intake Manifold- GM LS1/LS2/LS6	SpecificHolley 300-275 8.2 Inch SBF Hi-Ram Carbureted Manifold Base	SpecificHolley 300-290 Holley Single Plane EFI Split-Design Race Intake Manifold- GM LS3/L92	SpecificHolley Performance 300-133BK Engine Intake Manifold	SpecificHolley 300-670 Lo-Ram Intake Manifold Base Single Injector Satin Finish

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