Holley 300-123 For GM LS Hi-Ram EFI Intake Manifold 105mm Cathedral Port Kit

Part # 300-123 SKU HLY300-123

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$1,199.95
In stock, ships from a US warehouse
SKU: HLY300-123
UPC: 090127681688
Width: 16.00 (in)
Height: 31.00 (in)
Depth: 16.00 (in)
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Free, US only. Arrives in 2–4 days.
Returns
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Highlights

Fuel rail kit
Included
Manifold height (front)
12.32 in
Engine deck
OEM
Item length
30.5 in (Package)
Position
Engine
Fuel type
Gasoline
Engine size
LS1, LS2, LS6 (5.7L / 6L V8)
Item height
Front 12.32 in / Rear 11 in
Port shape
Cathedral (Oval)
Item width
16.25 in (Package)
Mounting style
Bolt-On
Injector bungs
Yes
Operating range
1500-7000 RPM
Color
Natural
Cylinder head type
Cathedral Port (Oval)
Material
Aluminum
Port size (h×w)
2.49 in × 1.21 in
Gaskets/hardware
Included
Egr
No
Type
Intake Manifold
Manifold height (rear)
11 in
Top
Removable (2-piece design)
Throttle body flange diameter
105 mm
Color/finish
Natural
Throttle body quantity
1

Description

Holley 300-123 For GM LS Hi-Ram EFI Intake Manifold 105mm Cathedral Port Kit

The Holley 300-123 is engineered for high-performance applications, specifically designed for GM LS engines. This intake manifold features a high-rise design that optimizes airflow, enhancing overall engine performance. The manifold’s cathedral port configuration is tailored to accommodate GM LS cylinder heads, ensuring a seamless fit and improved air distribution across the engine cylinders.

Constructed from lightweight yet durable materials, this Hi-Ram EFI intake manifold is built to withstand the rigors of high-performance driving. The manifold's design promotes increased horsepower and torque, making it an ideal choice for racing enthusiasts and those looking to maximize their engine's output. The 105mm throttle body opening allows for substantial airflow, catering to high RPM performance and better throttle response.

FITMENT: This intake manifold is compatible with various GM LS engines utilizing cathedral port cylinder heads, specifically designed to integrate seamlessly within those applications.

Key Features & Benefits

  • High-rise design for optimal airflow and improved performance
  • Cathedral port configuration tailored for GM LS cylinder heads
  • 105mm throttle body opening for enhanced airflow and throttle response
  • Lightweight and durable construction to withstand high performance demands
  • Designed for increased horsepower and torque across the powerband

Specifications

Identification
BrandHOLLEY
Part number300-123
SKUHLY300-123
UPC090127681688
Dimensions and weight
Dimensions (W × H × D)16.00 × 31.00 × 16.00 in
Material and finish
ColorNatural
MaterialAluminum
Series and warranty
SeriesLS Hi-Ram EFI
Details
Fuel rail kitIncluded
Manifold height (front)12.32 in
Engine deckOEM
IncludesIntake Manifold, Fuel Rails, Gaskets, Hardware
Item length30.5 in (Package)
PositionEngine
Fuel typeGasoline
Engine sizeLS1, LS2, LS6 (5.7L / 6L V8)
Item heightFront 12.32 in / Rear 11 in
Port shapeCathedral (Oval)
Item width16.25 in (Package)
Mounting styleBolt-On
Injector bungsYes
Operating range1500-7000 RPM
Cylinder head typeCathedral Port (Oval)
Port size (h×w)2.49 in × 1.21 in
Gaskets/hardwareIncluded
EgrNo
TypeIntake Manifold
Manifold height (rear)11 in
TopRemovable (2-piece design)
Throttle body flange diameter105 mm
Color/finishNatural
Throttle body quantity1

Shipping and returns

Shipping. Free on every order, US only. Orders arrive in 2–4 days.

Returns. 60-day free returns, except in extreme cases.

Support. Our team is available 24/7 for fitment mismatches or any other reason.

Warranty. Full manufacturer guarantee.

Holley 300-123 For GM LS Hi-Ram EFI Intake Manifold 105mm Cathedral Port Kit
Holley 300-123 For GM LS Hi-Ram EFI Intake Manifold 105mm Cathedral Port Kit
$1,199.95
In stock · free shipping

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