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Holley EFI 300-123BK LS Hi-Ram Intake Manifold - Black LS1/LS2/LS6

Part of: Holley EFI LS Hi-Ram Intake Manifold

Other options in this family: Holley EFI 300-122 Holley EFI 300-122BK

Manufacturer

Picture for manufacturer Holley EFI

Part Number

300-123BK
7 reviews
Sale Price

$1,249.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The Holley EFI LS Hi-Ram EFI Manifold is a high-performance intake manifold designed for GM LS1, LS2, and LS6 engines. This black-finished manifold features a Hi-Ram runner design that optimizes airflow for improved horsepower and torque across the RPM range.

Key Specifications:

  • Port Size: 2.49" height x 1.21" wide for excellent airflow capability
  • Runner Length: 6.58" with tapered as-cast runner cross-sectional area from 4.25 in² to 2.53 in²
  • Base Plenum Height: 8.42" to the lifter valley cover flange on engine block
  • Total Height: 12.32" with 92mm/105mm EFI plenum top installed
  • Throttle Body Compatibility: Designed for 102mm throttle body applications with 25-degree angled mounting
  • Plenum Top Gasket: 3/32" round O-ring cord design
  • Mounting Flange Gasket: Standard LS3 molded O-ring for reliable sealing

This manifold is engineered for use with Holley EFI throttle bodies and fuel injection systems, making it an ideal choice for LS engine swaps and performance builds. The black finish provides a clean, professional appearance in the engine bay. The Hi-Ram design positions the throttle body 3.84" forward from the engine block front flange for improved hood clearance and packaging options.

Products specifications

Basic Operating RPM Range

3500-8000

Brand

Holley EFI

Category

Engine

CNC Ported

No

Color

Black

Construction

Cast

Cylinder Head Port Shape

Cathedral

EGR Port

No

Emission Code

4

Engine

GM LS1/LS2/LS6

Flange Style

EFI

Fuel Injectors Included

No

Fuel Rail(s) Included

Yes

Fuel System Type

EFI

Gasket Or Seal Included

Yes

Grade Type

Performance

Intake Port Gasket(s) Included

No

Manifold Type

Hi-Ram

Material

Aluminum

Nitrous Bung(s) Included

No

Part Type

Engine Intake Manifold

Plenum Finish

Black

Product Type

Intake Manifold

Recommended Use

Forced Induction

Removable Runners

No

Removable Top/Lid

Yes

Single Or Dual Plane Type

Single Plane

Sub Category

Cylinder Block Components

Throttle Body Bore Diameter

105 MM

Throttle Body Gasket Included

Yes

Throttle Body Included

No

Vacuum Ports

Yes

Warning

California Proposition 65

Warranty

Manufacturer's Limited 90 Day Warranty

I've only had the tires for a week but so far so good real like them great price

Quick and easy thank you

Easy as can be. Hopefully everything goes a smooth with the delivery.

Good pricing fast delivery

REAL GOOD FEDX SLOW

no comment

So I was skeptical due to a lot of negative reviews online, but I seen they had a great price for Toyo extensa II tires about half the price of everywhere else. So I bought all 4 with the free shipping option, and they were shipped to me in 3-4 days each tire had a different tracking number but they all showed up at the same time. So I will definitely use the site again.

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