Holley EFI Intake Manifold 4150 Flange Oval Port Head Big Block V8 Chevy

When it’s time to convert your high-performance Big Block V8 Chevy to EFI, there’s no better companion than this intake manifold (300-561). Holley designed this manifold as the perfect fit for oval port heads and features a 4150 carb mounting flange. With a power band that operates from 3000 to 7500 RPM, it’s dyno-proven to make more horsepower and torque than other EFI manifolds. It’s thanks to the open plenum, single-plane design which is accompanied by anodized and laser-etched fuel rails.

Features and Benefits:
- Ideal for Converting High Performance BBC V8 to EFI
- Designed for Oval Port Heads
- 4150 Carburetor Mounting Flange
- 3000-7500 RPM Power Band
- Dyno-Proven to Make More Horsepower & Torque
- Open Plenum, Single-Plane Design
- Great for Hardcore Drag Racers
- Fuel Rails are Anodized & Laser-Etched
- Includes 2 Sets of Mounting Brackets
- Works with 1.48” or 2.56” O-Ring-to-O-Ring Injector Lengths
- Free of EGR Provisions

The manifold is an excellent complement for hardcore drag racers including NHRA Super Comp, Super Gas, and Street classes. Even applications that fall under the IHRA Quick Rod, Super Rod, and Hot Rod categories are encouraged to use it. It’s complete with two sets of mounting brackets, so drivers can use 1.48” or 2.56” O-ring-to-O-ring injector lengths. Plus, it’s free of EGR provisions.

Specifications:
- Oval Port Dimensions: 1.87” Tall x 1.60” Wide
- Front & Rear Height: 5.96”

Vehicle Fitment:
- 1960-1987 Chevy C10
- 1988-1998 Chevy/GMC C/K