This single plane EFI intake manifold delivers a broad RPM powerband for high-performance street/strip engines up to 7,500 RPM, designed to work with 4150-style throttle body EFI systems like Holley's Universal Throttle Bodies. Isolated air/fuel passages and back-cut injector bores improve charge density and fuel atomization.
Specifications:
- Engine: Chevrolet Small Block Gen I, 262-400ci (1957-86), or 1987-91 L98 aluminum-head Corvette engines (non-EGR)
- Basic Operating RPM Range: 2,500-7,500
- Flange Style: 4150 Square Bore
- Fuel System Type: EFI
- Fuel Inlet: 9/16-18"
- Manifold Type: High Rise, Single Plane
- Finish: Natural
- Construction: Cast Aluminum
- Vacuum Ports: Yes
- Port Size: 1.92" H x 1.20" W
- Height: Front 4.18", Rear 5.28"
- Fuel Rails: black-coated, laser-etched, included with bracket assortment; injectors not included
- Part Number: 300-260
Modification to the valve covers may be required with some cylinder head types. Fuel rail inlet threads are 9/16-18 for a -6 port.
FAQ
What engines does the 300-260 fit?
Small Block Chevy 262-400ci engines from 1957-86, and 1987-91 SBC engines with L98 aluminum Corvette heads (non-EGR applications), plus most SBC engines with aftermarket heads sharing the standard port flange.
Are fuel injectors included?
No, injectors are not included, but the fuel rails and bracket assortment are.
What's the maximum RPM this manifold is designed for?
7,500 RPM.
