Holley EFI SBC 4150 Single Plane Fuel Injection Intake Manifold<br>Chevy Small Block V8 with L31 Vortec cylinder heads 300-263
Type: EFI Intake Manifold | Fits: Chevy
The new single plane EFI (Electronic Fuel Injection) intake manifold is designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM. The manifold is designed to work with 4150 Style Throttle body EFI systems like the Holley 4150 style 112-587 and 112-588. These intake manifolds are designed to accept most stock hardware and accessory brackets, but offer performance features; like an updated plenum divider area, a 1" shorter overall height than most single plane manifolds, and a choice of two distributor clamp locations. The isolated design of the air/fuel passages helps to increase charge air density and performance. The fuel injector bores have back-cut exits in the runners for better fuel atomization. This design points the injectors at an angle to match the intake runner airflow angle. The black coated fuel rails and rail bracket assortment are included with the manifold for any easy installation with the injectors that you choose to use for your combination. Fuel rail designed for maximum throttle lever clearance.
Its low profile and single plane design are ideal for Sniper / Terminator TBI installations (dual planes aren't ideal for EFI)
Vortec Intake fits most popular GM crate engines equipped with Vortec or Fast Burn Heads including HO engines (like 350 HO), SP Series Engines (SP 350) and ZZ Series Engines (ZZ6).
Features:
- Single plane design with isolated plenum to keep the air charge cooler
- 4150 square bore mounting flange to adapt most aftermarket throttle body designs
- Power band: 2500-7500 RPM
- Height: Front 4.23", Rear 5.33"
- Port Size: 2.05” height 1.02" width
- Lower throttle body mounting height to help with hood clearance
- Black coated fuel rails with bracket assortment allowing different height fuel injectors
- Fuel injectors are not included
- Fuel rail designed for maximum throttle lever clearance
- Small Block Chevrolet 262-400 cid engines equipped with 1996-2002 (L31) Vortec cylinder heads (non-EGR applications)
Specs:
- Basic Operating RPM Range: 2500-7500 RPM
- Brand: Holley EFI
- Carburetor Flange: Square/4150
- Carburetor Quantity: 1
- Carburetor Studs Included: No
- Category: Engine
- CNC Ported: No
- Color: Natural
- Construction: Cast
- Cylinder Head Port Shape: Rectangle
- EGR Port: No
- Emission Code: 3
- Engine: Chevrolet Small Block Gen II (LT Based)
- Finish: Satin
- Flange Style: 4150 Square Bore
- Front Height: 4.18"
- Front Maximum Height: 4.18 IN
- Fuel Injectors Included: No
- Fuel Inlet: 9/16-18"
- Fuel Rail(s) Included: Yes
- Fuel System Type: EFI
- 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
- Part Type: Engine Intake Manifold
- Plenum Finish: Natural
- Product Type: EFI Intake Manifold
- Rear Height: 5.28"
- Rear Maximum Height: 5.33 IN
- Removable Runners: No
- Removable Top/Lid: No
- RPM Power Band: 2500-7500
- Single Or Dual Plane Type: Single Plane
- Sub Category: Cylinder Block Components
- Throttle Body Included: No
- Warranty: Limited 90 Day
Tech Resources:
Modification to the valve covers may be required when this manifold is used with some types of cylinder heads.
The fuel rail inlet threads are 9/16-18 for a -6 port.
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Important Notices
- Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
