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Air and Fuel› Intake Manifolds and Components

Holley

Holley EFI LS1 HI-RAM BLK KIT W 102MM TB 42LB INJ 300-123BK-42K

$2,034.95 $1,914.90 Save $120.05

SKU: H00E 300-123BK-42K

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Holley 300-123BK is a Hi-Ram intake manifold designed for GM LS1/LS2/LS6 engines. This EFI manifold features a 105mm throttle body flange and cathedral ports. Constructed from cast aluminum with a black powder coat finish, it is intended for high-performance street and racing applications.

The Hi-Ram intake is suitable for Naturally Aspirated (N/A) or forced induction engines in the 6.0 to 7.0+ liter range, with a power band optimized between 1500-7000 RPM, potentially reaching 7000-8000+ RPM. Its modular base allows for adaptation to various carbureted and EFI tops, making it a foundation for custom induction systems.

Fitment

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Specifications

BrandHolley
Part NumberH00E 300-123BK-42K

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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