Holley EFI Intake - Chevy Big Block V8 EFI 300-561
Type: EFI Intake Manifold | Fits: Chevy
Holley EFI is excited to launch four new multi-point fuel injection intake manifolds for the big block Chevy. These new intakes are available to fit oval or rectangular port heads, and 4150 or 4500 style throttle bodies. These Intakes are ideal for converting your big block high performance or racing engine from carburetion to fuel injection. These intake manifolds were computer designed and dyno proven to produce more horse power and torque than other EFI manifolds. Each manifold package includes anodized and laser etched fuel rails, and two sets of mounting brackets (brackets allow use of 1.48" or 2.56" O-ring to O-ring injector lengths).
Features:
- Open plenum/single plane design
- No EGR provisions
- 3000-7500 RPM power band
- 4150 carburetor mounting flange
- Includes fuel rails and mounting brackets
- Designed for today's larger cubic inch big block Chevy race engines
- Perfect for hard core drag racers in the NHRA Super Comp, Super Gas, and Street classes as well as IHRA Quick Rod, Super Rod, and Hot Rod categories
- Oval Port Dimensions: 1.87” High x 1.60” Wide
- Height: Front 5.96", Rear 5.96"
Specs:
- Basic Operating RPM Range: 3000-7500 RPM
- Brand: Holley EFI
- Carburetor Flange: Square/4150
- Carburetor Studs Included: No
- Category: Engine
- Color: Natural
- Construction: Cast
- Cylinder Head Port Shape: Oval
- EGR Port: No
- Emission Code: 3
- Engine: Chevy Big Block V8
- Fuel Injectors Included: No
- Fuel Rail(s) Included: Yes
- Gasket Or Seal Included: No
- Grade Type: Performance
- Intake Port Gasket(s) Included: No
- Manifold Type: High Rise
- Material: Aluminum
- Nitrous Bung(s) Included: No
- Part Type: Engine Intake Manifold
- Plenum Finish: Natural
- Product Type: EFI Intake Manifold
- Removable Runners: No
- RPM Power Band: 3000-7500
- Single Or Dual Plane Type: Single Plane
- Sub Category: Cylinder Block Components
- Throttle Body Included: No
- Warranty: Limited 90 Day
Tech Resources:
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Important Notices
- Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
