Best LS EFI Intake Manifolds for 4150 Style Setups and Fuel Rails

Answer: If you’re upgrading an LS-era engine with a 4150-style carburetor flange, these EFI intake manifolds pack a reliable single-plane design with integrated fuel rails and a variety of compatible LS1/LS2/LS6 cylinder heads. They’re best for performance-minded V8 builds that want improved air flow and easier fuel delivery, especially in street and light-competition applications. The top picks cater to different LS Gen III/IV configurations, timing needs, and bolt-on kit preferences. This guide highlights five strong options and explains which driver each model fits best.

Buyer note: The following summaries emphasize suitability for common LS swap goals—maximum mid-range power, simple installation, and compatibility with cathedral or ported LS heads. A quick reference table below helps compare core attributes at a glance.

Woosphy Single Plane EFI Intake Manifold

The Woosphy 300-137 series is designed for GM Gen III/IV LS engines, including LS1/LS2/LS6 cylinder heads. It features a single-plane design and compatibility with listed OEM part numbers (300-137, 534-219, HH6313S, HH0862S, HH6449RS). Best for street and moderate-performance builds that require a straightforward upgrade path with proven LS fitment. Choose this if you want a reliable, OEM-aligned manifold that mirrors factory LS performance with simple bolt-in installation.

• Best for: Street-driven LS engines needing a dependable swap with OEM-style compatibility.
• Limitations: As a single-plane, it may favor high-end torque slightly less than a bigger dual-plane in certain applications.

NEWZQ Aluminum Single Plane EFI Manifold

The NEWZQ unit is another OE-replacement option built for Gen III/IV LS engines, matching LS1/LS2/LS6 compatibility. It emphasizes a complete, ready-to-install manifold with integrated fuel rails to ease the assembly process. Best for builders who want a straightforward OE-like fit and reliable performance without custom fabrication. It’s a solid alternative when OEM compatibility is a priority.

• Best for: People upgrading to an OE-accurate EFI manifold with bundled fuel rails.
• Limitation: May share similar performance traits with other OEM-aligned single-plane designs; personal tuning may still be needed for peak willingness.

Haytalras 300-137 Multi-Component Kit

The Haytalras kit combines a 300-137 single-plane mid-rise manifold with a fuel rail assembly for LS1/LS2/LS6 compatibility. It targets a complete bolt-on experience for GM small-block applications, spanning 4.8L to 6.0L V8s. The mid-rise height of 4.95 inches helps clear certain hood configurations. Best for shop projects aiming for a full kit that reduces the need for extra parts beyond the manifold and rails.

• Best for: DIY enthusiasts seeking a complete, ready-to-install kit with mid-rise clearance.
• Limitation: Mid-rise may require hood clearance checks on some vehicle applications.

DEEPMOTOR Aluminum Single Plane EFI Manifold

The DEEPMOTOR offering is an aluminum single-plane EFI manifold designed for Gen III LS1/LS2/LS6 cathedral-port configurations. It targets a broad RPM window (3,500–8,000 RPM) and emphasizes lightweight construction for improved engine bay mass and power delivery. Best for high-revving builds where weight savings and a capable RPM range matter. Use this when you want reliable airflow with a strong upper RPM pull.

• Best for: High-rev, performance-focused LS builds with cathedral-port heads.
• Limitation: Cathedral-port only; may not fit most external-port LS configurations without modification.

JGhyperX 300-137 Mid-Rise EFI Manifold

The JGhyperX 300-137 is a mid-rise single-plane manifold designed for Chevy Small Block Gen I engines and is compatible with GM LS1/LS2/LS6 V8 setups. The kit emphasizes complete inclusion, with the necessary components for a straightforward installation. Best for builders who want a mid-rise option that supports a range of LS engines while maintaining a compact footprint for hood clearance considerations.

• Best for: Vehicles needing a complete kit with mid-rise geometry for LS1/LS2/LS6 swaps.
• Limitation: Mid-rise height may affect certain engine bays; verify clearance before ordering.

QPCRAP 28095 Single Plane EFI Manifold Set

The QPCRAP kit provides a complete 28095S single-plane EFI manifold with high-flow fuel rails and hardware. It aims at broad GM LS Gen III/IV compatibility, including LS1/LS2/LS6 engines across a range of 4.8L to 6.0L. Best for builders who want a comprehensive package with high-quality aluminum construction and a well-rounded hardware assortment for smooth installation.

• Best for: Broad LS Gen III/IV applications needing a robust, complete kit.
• Limitation: The hardware kit is comprehensive but verify compatibility with your specific intake runner configuration.

Buying Guide: Choosing The Right 4150 EFI Intake Manifold

What matters most is matching manifold design to your engine family and goals. For LS Gen III/IV engines, single-plane manifolds generally offer improved high-RPM airflow and throttle response, at the potential cost of mid-range torque in some setups. If hood clearance or mounting hardware simplicity is a priority, mid-rise or complete kits can reduce installation complexity. Consider the following questions as you compare options:

• What engine heads are on the build? Cathedral-port vs. LS1/LS2/LS6 heads influence the manifold’s compatibility and airflow characteristics.
• Is a complete kit with fuel rails important? Some options include rails and hardware, saving installation time.
• Do you need mid-rise or low-profile clearance? Mid-rise manifolds may enable taller intakes or certain hood configurations.
• What RPM range does the target build require? Higher RPM demands additional airflow and robust rails; confirm the manifold’s advertised RPM window.
• Are OEM part-number alignments important? Some buyers prefer OE replacement style to preserve fitment with factory components.

FAQ

• What is a 4150 EFI manifold? A 4150 EFI manifold is designed to fit the 4150-style flange and provides electronic fuel injection compatibility for LS-based engines.
• Which LS engines do these manifolds support? Most options target Gen III/Gen IV LS engines, including LS1/LS2/LS6 configurations.
• Is a complete kit better than a base manifold? If you want a straightforward install, kits that include fuel rails and hardware save time and ensure compatibility.
• What should I consider for hood clearance? Mid-rise manifolds can require more space; measure available clearance before purchasing.
• Do these manifolds affect RPM performance? Yes, single-plane designs typically favor upper RPM power and throttle response, with some trade-off in low-end torque.
• Are OEM-part compatible manifolds preferable? OEM-aligned options can ease installation and stock-like fitment for reliability.

Summary Of Selected Products

The list below highlights the five standout options from the catalog, with the buyer intent each suits best:

• Woosphy Single Plane EFI Intake Manifold — Best for: street LS builds needing proven LS compatibility with a straightforward OEM-style upgrade.
• NEWZQ Aluminum Single Plane EFI Manifold — Best for: straightforward OE-like replacement with integrated rails and solid LS compatibility.
• Haytalras 300-137 Kit — Best for: complete bolt-on kit with mid-rise fit for easier installation on a broad set of LS engines.
• DEEPMOTOR Aluminum Single Plane EFI Manifold — Best for: high-RPM performance with cathedral-port LS heads and a lighter aluminum design.
• JGhyperX 300-137 Mid-Rise — Best for: complete mid-rise solution for LS swaps requiring a balanced, compact footprint.