Holley 300-123 For GM LS Hi-Ram EFI Intake Manifold 105mm Cathedral Port Kit
Part # 300-123 SKU HLY300-123
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
Vehicle fitment
| Make | Model | Submodel | Years |
|---|
No vehicle matches that filter.
Fitment data from the manufacturer catalogue. Check your engine before ordering, or call us.
Specifications
| Identification | |
|---|---|
| Brand | HOLLEY |
| Part number | 300-123 |
| SKU | HLY300-123 |
| UPC | 090127681688 |
| Dimensions and weight | |
| Dimensions (W × H × D) | 16.00 × 31.00 × 16.00 in |
| Material and finish | |
| Color | Natural |
| Material | Aluminum |
| Series and warranty | |
| Series | LS Hi-Ram EFI |
| Details | |
| Fuel rail kit | Included |
| Manifold height (front) | 12.32 in |
| Engine deck | OEM |
| Includes | Intake Manifold, Fuel Rails, Gaskets, Hardware |
| 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 |
| Cylinder head type | Cathedral Port (Oval) |
| 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 |
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.
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