Part # 300-561
$787.95
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 & Benefits
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
Fits: Holley EFI Intake Manifold 396, 402, 427, 454, 502 for 4150 Style Flange, Oval Port Heads
In the box: Fuel Rail(s)
| Basic Operating RPM Range | 3000-7500 RPM |
| CNC Ported | No |
| Carburetor Flange | Square/4150 |
| Carburetor Quantity | 1 |
| Color | Natural |
| Construction | Cast |
| Cylinder Head Port Shape | Oval |
| Deck Height | 9.8 IN |
| EGR Port | No |
| Engine | Chevy Big Block V8 |
| Flange Style | 4150 Square Bore |
| Manifold Type | High Rise |
| Material | Aluminum |
| Plenum Finish | Natural |
| Removable Runners | No |
| Removable Top/Lid | No |
| Single Or Dual Plane Type | Single Plane |
| Throttle Body Bore Diameter | 3.6 IN |
| Vacuum Ports | Yes |
The EFI Brain
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