Description
Holley 4150 Single Plane Intake Manifold – Small Block Ford (8.2″ Deck)
Engineered for high-rpm street and competition applications, delivering maximum air charge density and optimized plenum volume for SBF 289–347 engines.
High-Performance Single Plane Architecture
The Holley 300-277 single plane intake manifold is custom-engineered for Small Block Ford 289, 302, and 347 cubic-inch engines utilizing an 8.2″ deck height. Built to operate seamlessly across a broad 2,500 to 7,500 RPM powerband, this intake utilizes an isolated plenum design to reduce heat transfer from the lifter valley, ensuring cooler, denser intake charge temperatures for maximum horsepower delivery.
Featuring a standard 4150 square-bore mounting flange, the 300-277 accommodates mechanical secondary square-bore carburetors or 4150-style throttle body EFI systems. Integral 1/8″, 1/4″, and 3/8″ NPT accessory ports underneath the carburetor pad provide easy vacuum plumbing for power brakes, PCV, and ancillary accessories without restricting primary airflow.
Key Features
- ☑ High-rpm single plane runner design optimized for 2,500–7,500 RPM operation
- ☑ Isolated runner plenum keeps fuel-air mixture cool for improved charge density
- ☑ Precision 4150 square bore mounting flange accepts standard 4150 carbs and EFI throttle bodies
- ☑ Cast aluminum construction with porting material allowing expansion up to 2.00″ H x 1.20″ W
- ☑ Integrated 1/8 NPT, 1/4 NPT, and 3/8 NPT vacuum accessory ports under carb pad
- ☑ Compatible with stock hardware and standard accessory bracketry on 8.2″ SBF blocks
Technical Specifications
| Brand | Holley |
|---|---|
| Part Number | 300-277 |
| Engine Compatibility | Small Block Ford 289 / 302 / 347 cu. in. |
| Deck Height | 8.2″ Deck |
| Manifold Type | Single Plane |
| Flange Type | 4150 Square Bore |
| Power Band | 2,500 – 7,500 RPM |
| Front Height | 5.58″ |
| Rear Height | 6.40″ |
| As-Cast Port Size | 1.82″ H x 1.04″ W |
| Material / Finish | Cast Aluminum / Natural Satin |
What’s Included in the Box
- 1x Holley 300-277 Single Plane Aluminum Intake Manifold (Natural Satin)
- Integrated NPT Pipe Plugs for unused accessory ports
- Installation Hardware & Detailed Mounting Specification Sheet
As an authorized Holley UK distributor, JP Racing supplies authentic, high-performance Holley motorsport components directly to race teams and enthusiast builders. All orders ship rapidly from our UK warehouse, backed by expert technical advice and dedicated UK customer support.
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