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Holley EFI LS Hi-Ram Intake Manifold Bases 300-227 Manifolds, EFI, LS, Hi-Ram, Base Only, Cathedral Port, Multi-port, Standard Deck, Aluminum, Satin Finish, Chevy, 4.8L, 5.3L, 5.7L, 6.0L, Each

Holley EFI LS Hi-Ram Intake Manifold Bases 300-227 Manifolds, EFI, LS, Hi-Ram, Base Only, Cathedral Port, Multi-port, Standard Deck, Aluminum, Satin Finish, Chevy, 4.8L, 5.3L, 5.7L, 6.0L, Each

A$2,298.34
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Holley EFI LS Hi-Ram intake manifold bases are cost-effective alternatives to fabricated sheet metal for high performance applications where induction system height is not limited. Coupling these cast aluminum Hi-Rams with the high flowing LS-style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. These modular lower manifolds accept a wide range of carbureted and EFI tops, making them attractive to builders and fabricators as the perfect foundations for custom induction systems. Fuel rails are included and machined for -8 AN O-ring fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system. The aggressive, bold, race-bred styling of Holley GM LS modular Hi-Ram lower manifolds will make bad intentions clear for drag race, muscle car, marine, off-road, sand rails, pulling trucks, track, and street-rod applications.

Additional Information

w/Cathedral Ports

Part Type

Hi Ram Intake Manifold Base EFI LS1/LS2/LS6

Data: v4.2 - Upd: 2026-10-13 18:46:04

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
300-227
Product Attributes - Part Type
Intake Manifolds, Fuel Injected
Product Attributes - Product Line
Holley EFI LS Hi-Ram Intake Manifold Bases
Product Attributes - UPC
090127681725
Product Attributes - Cylinder Head Configuration
Cathedral Port LS1/LS2/LS6
Product Attributes - Fuel Injection Style
Multi-port
Product Attributes - Basic Operating RPM Range
Idle-8,000
Product Attributes - Intake Section Included
Base only
Product Attributes - Engine Block Deck Height
Standard deck
Product Attributes - Injectors Included
No
Product Attributes - Multi-Port Fuel Rails Included
Yes
Product Attributes - EGR
No
Product Attributes - Aftermarket Fuel Rail Required
Yes
Product Attributes - Throttle Body Included
No
Product Attributes - Supplemental Bosses Cast-In
No
Product Attributes - Supplemental Bosses Machined
No
Product Attributes - Runners Included
Yes
Product Attributes - Runners Removable
No
Product Attributes - Base Material
Aluminum
Product Attributes - Base Color
Natural
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Fuel rails are machined for -8 AN O-ring female fittings. Cathedral port heads only. Can use 92mm. or 102mm. throttle body with purchase of proper flange.

Reference Information

Brand Name/s Holley
StreetFX SKU hly300-227
SFX Item ID 4784623
Supplier Item Code 4784623
Manufacturer SKU 300-227
Manufacturer UPC 90127681725
Alternative References HOL300-227, 4.8L, 5.3L, 5.7L, 6.0L

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2007
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294

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