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Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6

Part # 300-227 Be the first to write a review

LS1/LS2/LS6 Cathedral Port EFI Base Only

Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6

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Advertised Price $921.95
$828.95
Save $93.00
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4

Emissions

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

    See Emissions Details
The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as an alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more. • Cast aluminum construction • Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range with max power at 7000-8000+RPM • Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations • The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and for builders and fabricators as the foundation for custom induction systems. • EFI fuel rails are machined for -8AN O-ring fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits

Features:

  • Silver color
  • Mounting Flange Gasket Type - Standard LS3 Molded O-ring
  • Port Size - 2.49” H x 1.21” W
  • Plenum Top Gasket Type - 3/32” Round O-ring Cord
  • Runner Length - 6.58” As-Cast Runner Cross-Sectional Area - Tapered 4.25 in² to 2.53 in²

About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!

Basic Operating RPM Range3500-8000 RPM
Brand Holley EFI
Carburetor FlangeN/A
Carburetor QuantityN/A
Carburetor Studs IncludedN/A
CategoryEngine
CNC PortedNo
ColorNatural
ConstructionCast
Cylinder Head Port ShapeCathedral
Deck Height9.24 IN
EGR PortNo
Emission Code4
EngineGM LS1/LS2/LS6
Flange StyleN/A
Fuel Injectors IncludedNo
Fuel Rail(s) IncludedYes
Fuel System TypeEFI
Gasket Or Seal IncludedYes
Grade TypePerformance
Intake Port Gasket(s) IncludedNo
MaterialAluminum
Nitrous Bung(s) IncludedNo
Part TypeEngine Intake Manifold
Plenum FinishNatural
Product TypeIntake Manifold Base
Removable RunnersNo
Removable Top/LidYes
Single Or Dual Plane TypeSingle Plane
Sub CategoryCylinder Block Components
Throttle Body Bore DiameterN/A
Throttle Body Gasket IncludedN/A
Throttle Body IncludedNo
Type of ComponentLower Manifold
Vacuum PortsYes
WarrantyManufacturer's Limited 90 Day Warranty
UPC090127681725
Part Number300-227
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

These parts should be used for the following applications: Performance, Racing, and Street Rodder where hood restrictions are not a consideration.
Manufacturer's Limited 90 Day Warranty: See Details
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    *Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.

    Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6
    Holley Hi-Ram Lower Manifold - GM LS1/LS2/LS6
    Advertised Price $921.95
    $828.95
    Save $93.00