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
Brand
Holley EFI
Construction
Cast
Emission Code
3
Engine
Chevy Big Block V8
Manifold Type
High Rise
Product Type
EFI Manifolds
RPM Power Band
3000-7500
Part Number
300-561
Emissions
This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing 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
Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.