Description
Holley Big Block Chevy Single Plane EFI Intake Manifold (Rectangular Port)
Engineered for high-rpm performance and seamless EFI conversion on Big Block Chevy V8 engines.
Performance Fuel Injection Conversion
The Holley 300-563 EFI intake manifold is a single-plane, open plenum manifold optimized for Big Block Chevy engines (396-502ci) running rectangular port cylinder heads. Computer-designed and dyno-proven to maximize airflow velocity and high-rpm engine torque, it is ideal for street/strip setups and hard-core drag racing applications operating in the 3,500 to 8,000 RPM range.
Featuring a 4150 square-bore throttle body flange, this cast aluminum intake includes precision fuel injector bungs and anodized fuel rails. It relocates EGR passages to the outside of the manifold to optimize port sizes and deliver uncompromised airflow directly to your engine’s combustion chambers.
Key Features
- ☑ High-rpm single-plane open plenum design optimized for 3,500 – 8,000 RPM power band
- ☑ Tailored for Big Block Chevy V8 engines with standard OEM deck height and rectangular port cylinder heads
- ☑ Standard 4150 square-bore flange accepts popular 4150-style 4-barrel EFI throttle bodies
- ☑ Includes anodized and laser-etched fuel rails with dual mounting bracket sets
- ☑ Port-matched upper and lower runners with external EGR passages for reduced airflow restriction
- ☑ High-grade cast aluminum construction in a clean natural finish
Technical Specifications
| Brand | Holley |
|---|---|
| MPN | 300-563 |
| Engine Compatibility | Chevy Big Block V8 (396-502ci) |
| Cylinder Head Port Style | Rectangular Port (2.28″ H x 1.48″ W) |
| Flange Style | 4150 Square Bore |
| RPM Operating Range | 3,500 – 8,000 RPM |
| Manifold Height | 5.96″ Front / 5.96″ Rear |
| Material / Finish | Cast Aluminum / Natural |
| Fuel Rail Kit Included | Yes (Anodized Aluminum) |
What’s Included in the Box
- (1) Holley Cast Aluminum Single Plane EFI Intake Manifold (300-563)
- (2) Anodized and Laser-Etched Fuel Rails
- (4) Fuel Rail Mounting Brackets (Supports 1.48″ or 2.56″ O-ring injector lengths)
- (1) Hardware Kit and Installation Fitting Accessories
When converting your high-performance Big Block Chevrolet to electronic fuel injection, Holley delivers uncompromised quality and race-winning power gains. At JP Racing, we provide technical guidance and fast UK dispatch to keep your motorsport project moving forward.
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