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"
| Basic Operating RPM Range | 3000-7500 RPM |
| Brand | Holley EFI |
| Carburetor Flange | Square/4150 |
| Carburetor Studs Included | No |
| Category | Intake Manifolds |
| 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 |
| Plenum Finish | Natural |
| Product Type | EFI Intake Manifold |
| Removable Runners | No |
| RPM Power Band | 3000-7500 |
| Single Or Dual Plane Type | Single Plane |
| Throttle Body Included | No |
| Warranty | Limited 90 Day |
| UPC | 090127716489 |
| Part Number | 300-561 |
Emissions
3
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicle
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