For enthusiasts seeking maximum power from GM’s LS beasts, single-plane intake manifolds can unlock a broader power band and improved throttle response at high RPM. This guide highlights top-rated LS single-plane designs optimized for naturally aspirated builds and power-adder setups. Each option below targets distinct LS platforms (LS1/LS2/LS6) and cathedral-port configurations, balancing flow efficiency with manifold height and compatibility. Read on to compare features, compatibility, and performance implications across five proven choices.
| Product | Brand | Compatibility | Notes |
|---|---|---|---|
| Dokili 300-132 LS Single Plane Intake Manifold | Dokili Store | Chevy Camaro 1998-2002, Corvette 1997-2007, Cadillac CTS 2004-2005 (LS1/LS2/LS6) | High-rise, 4150 flange, broad power 2,500–7,500 RPM |
| 300137 Aluminum Single Plane Mid-Rise EFI LS Intake Manifold | Unknown | GM LS1/LS2/LS6, 4.8L-6.0L | Mid-rise, EFI, 2,500–7,000 RPM |
| 300-132 LS Mid-Rise Carbureted Intake Manifold | JGhyperX Store | Chevy SBC Cathedral Port LS1/LS2/LS6 (4.8L-6.0L) | Carbureted, 4-barrel mounting |
| Single Plane with Fuel Rails EFI Manifold | Woosphy Store | GM Gen III/IV LS Engines (LS1/LS2/LS6) | EFI replacement, multiple part numbers |
| Aluminum Single Plane EFI Intake Manifold (Black) | Unknown | Gen III LS1/LS2/LS6 Cathedral Port | Aluminum, 3500–8000 RPM |
Dokili LS Single Plane Intake Manifold
The Dokili single-plane intake is designed to fit Cadillac CTS V8 5.7L and various GM LS1/LS2/LS6 configurations (Chevy Camaro 1998-2002, Corvette 1997-2007). It features a high-rise, single-plane layout intended to maximize airflow and volumetric efficiency across a broad RPM range. The design includes a standard 4150 square bore flange suitable for naturally aspirated engines or boosted setups, including centrifugal blowers or nitrous systems. Operators should verify compatibility with their specific engine year and configuration to ensure a proper seal and fitment.
Key points:
- High-rise single-plane design targets peak power at higher RPMs (2,500–7,500 RPM).
- Compatible with LS1/LS2/LS6 5.7L/6.0L engines and cathedral-port configurations.
- Standard 4150 flange for versatile mounting, including power adders.
300137 Aluminum Single Plane Mid-Rise EFI LS Intake Manifold
This mid-rise EFI intake is tailored for GM LS1/LS2/LS6 engines with 4.8L-6.0L displacement. It features a single-plane design optimized for a broad but high RPM operating window, with an overall height described as 4.95 inches. The part number 300-137 indicates compatibility with common LS swap configurations and EFI fuel systems, providing a straightforward path for modern EFI builds seeking improved airflow and throttle response.
- Fits LS1/LS2/LS6 small-blocks in 4.8L-6.0L ranges.
- Single-plane, mid-rise configuration for enhanced top-end power.
- Compatible with EFI systems and standard mounting procedures.
300-132 LS Mid-Rise Carbureted Intake Manifold
The 300-132 manifold is designed for cathedral-port LS engines with carburetor mounting, suitable for Cathedral-Port configurations in LS1/LS2/LS6 families. It features a mid-rise single-plane intake style with a 4-barrel square bore mount. Key metrics include an operating RPM range of 2,500–7,000 and an intake height of about 4.95 inches, making it a viable option for carbureted LS builds seeking improved airflow and throttle response at higher RPMs.
- Cathedral Port compatibility for LS1/LS2/LS6 engines.
- Carbureted 4-barrel mounting with single-plane design.
- RPM focus in the 2,500–7,000 range; mid-rise height for clearance.
Single Plane with Fuel Rails EFI Intake Manifold
This EFI manifold is marketed as a replacement for GM Gen III/IV LS engines, covering LS1/LS2/LS6 configurations. The listing includes multiple part numbers (300-137, 534-219, HH6313S, HH0862S, HH6449RS) and emphasizes compatibility with LS cylinder heads. It provides an EFI-compatible single-plane design with integrated or compatible fuel rails, aimed at enhancing high-RPM intake flow for performance applications, both naturally aspirated and with power adders.
- EFI compatibility for Gen III/IV LS engines.
- Broad compatibility with LS1/LS2/LS6 configurations.
- Single-plane flow characteristics aimed at higher RPM power.
Aluminum Single Plane EFI Intake Manifold (Black)
Aluminum construction for LS1/LS2/LS6 cathedral-port engines with an EFI setup. The black finish denotes a durable, heat-tolerant manifold designed for high-RPM operation. The RPM range is indicated as 3500–8000, aligning with high-performance applications where airflow efficiency and throttle response are critical. This option emphasizes a sturdy build suitable for street and track use, with compatibility across Gen III/IV LS platforms possessing cathedral-port heads.
- Cathedral-port LS1/LS2/LS6 compatibility.
- Aluminum construction with EFI compatibility.
- Operating range centered around high RPM power.
Buying Guide: Key Purchase Considerations
When selecting a single-plane intake manifold for LS engines, consider these factors to optimize performance and reliability:
- Engine compatibility: Verify displacement (4.8L-6.0L), head type (cathedral-port), and whether the build is EFI or carbureted. Match the manifold’s flange and bolt pattern to your carburetor or EFI rails.
- RPM target: Single-plane designs favor high-RPM power; confirm the expected improvement within your intended RPM window (e.g., 2,500–7,500 RPM) to align with your driving goals, whether racing or street.
- Manifold height: Mid-rise vs. high-rise affects hood clearance and installation space. Choose based on engine bay constraints and accessory clearance (fuel rails, throttle bodies, and turbo/supercharger setups).
- Power adders: If using nitrous, turbo, or supercharger, ensure the intake manifold supports these configurations and maintains seal integrity under boost.
- Material and finish: Aluminum manifolds offer light weight and heat resistance; finishes (raw, black) can impact heat absorption and aesthetics.
- Warranty and fitment: Check product documentation for compatibility with specific vehicle years and trims, as well as any required gaskets or mounting hardware not included in the package.
Depth of airflow testing, port match quality, and overall tunability impact real-world gains. For some builds, a well-matched single-plane manifold can complement higher-lift camshafts and optimized intake runners, while for others a dual-plane design might better suit low-end torque. Always consider the complete intake and induction system, including throttle bodies, fuel rails, and ECU calibration, when evaluating performance gains.