Best Supercharger for LS Engine: Top Picks for 4.8L to 6.2L Builds 2026
Answering the question most LS enthusiasts search for: which supercharger kit best boosts horsepower on GM LS engines? This guide highlights five top options that fit common LS blocks from 4.8L to 6.2L and pairs them with practical buyer notes. Each option is assessed for power potential, installation scope, and how it suits different drivers—from street cruisers to weekend racers. The table below summarizes the five picks to help you compare at a glance.
| Product | ||
|---|---|---|
| Complete 6-71 Roots Supercharger Kit (Speedmaster) | Street-driven LS builds with carb compatibility | 45-55% horsepower gain potential |
| Dirty Dingo LS Billet Turbo Oil Feed Complete Kit | Turbo/supercharger setups requiring clean oil feed | Premium oil feed kit with CNC billet parts |
| OywhC MAP Vacuum Port Sealing Cap (Black) | Engine sealing and port integrity improvement | Prevents leaks, preserves intake efficiency |
| Edelbrock 1564 Supercharger Assembly | GM SUV 1500 Gen IV 5.3L LS engines | Solid boost and torque figures with modest setup |
| DJTuning Gen IV LS Rectangle Port Adapter | Adapter solutions for Hellcat-style LT/LS ports | Flexible installation options for rectangle-port engines |
Speedmaster Complete 6-71 Roots Kit for GM LS
The Speedmaster 6-71 Roots-style kit is a complete bolt-on option designed for broad LS compatibility. It is built to engage with LS1 through LS7 blocks as well as later 4.8L, 5.3L, 6.0L, and 6.2L engines. With a factory-timed rotor setup and a dual-carb-capable intake, this kit aims to deliver immediate throttle response and meaningful power gains. Best for a street-smart build that wants reliable instant-boost from idle to mid-range rpm. A carb adapter is included for square-bore carbs, though fuel and carburation are sold separately.
Who it’s best for: Builders seeking a robust, all-in-one Roots setup that’s easy to bolt on, with a focus on street performance and carb-compatible configurations.
Why chosen: It covers a wide range of LS blocks and includes the major components needed for a complete, streetable boost package. The inline 50T/55T Gilmer pulleys and bracketed idler promote a clean belt drive.
Limitations to note: Carbs and fuel system components are not included and may require extra tuning for real-world driving at high boost. Verify rotating assembly for sustained race use.
Dirty Dingo LS Billet Turbo Oil Feed Complete Kit
The Dirty Dingo billet oil feed kit focuses on delivering reliable oil supply for turbo or supercharger installations, featuring CNC-machined billet aluminum and stainless steel lines. This kit prioritizes precision and durability in the oil path, making it a strong choice for builds where a clean, dependable oil feed is critical. Best for LS engines in boosted setups where precise oil routing matters for long-term performance.
Who it’s best for: Builders prioritizing a high-quality, billet oil feed system to support forced induction reliability.
Why chosen: The CNC billet aluminum construction and stainless line material offer robust durability, which helps resist heat and pressure in high-boost scenarios.
Limitations to note: This kit is an oil-feed accessory and not a complete supercharger system by itself, so compatibility with your specific blower setup should be verified.
OywhC MAP Vacuum Port Sealing Cap (Black)
The OywhC sealing cap is designed to seal MAP sensor ports and idle locations to prevent air leaks, which can otherwise disrupt intake flow during boost. Made from T6061 aluminum with CNC precision and an anodized finish, this part emphasizes durability and reliable sealing. Best used as a complementary upgrade in engines where port integrity is crucial for consistent boost behavior.
Who it’s best for: LS builds where sealing ports is a priority to maintain intake efficiency under boost.
Why chosen: Its precision manufacturing supports reliable seal across multiple LS variants, including LSA and LSX configurations.
Limitations to note: This is a sealing cap, not a complete supercharger kit, and it does not add horsepower on its own.
Edelbrock 1564 Supercharger Assembly for GM SUV 1500 Gen IV
The Edelbrock 1564 assembly targets GM SUV platforms with Gen IV cathedral-port 5.3L LS engines. It offers up to 384 RWHP and 390 RW ft-lbs of torque at about 6 psi of boost, making it a solid choice for drivers seeking a noticeable power increase on a relatively simple setup. Best for those prioritizing a proven, brand-name boost solution with a straightforward installation path for mid-boost street performance.
Who it’s best for: LS-powered SUVs and trucks that want a balance of power gain and install familiarity.
Why chosen: Edelbrock’s engineering focus on street performance and a reliable boost curve makes this kit attractive for daily drivers who still crave acceleration and torque.
Limitations to note: Boost level is modest compared with some high-boost roots or twin-screw kits, and the installation may fit specific cathedral-port cylinder heads more naturally.
DJTuning Gen IV LS Rectangle Port Hellcat Adapter
The DJTuning Hellcat-style adapter kit provides a practical route for installing rectangle-port Hellcat-based components on Gen IV LS engines. It includes two adapter plates, bolts, and seals to connect the engine to the chosen blower or intercooling hardware. Best for builders who need to bridge port configurations and broaden compatibility across different blower architectures.
Who it’s best for: Builders pursuing flexible port adaptation in a Gen IV LS framework.
Why chosen: The adapter set adds installation versatility, which is helpful when combining non-standard components with LS blocks.
Limitations to note: This is an adapter kit, not a complete blower system, and performance depends on the rest of the forced-induction setup.
Buying Guide: Key Considerations For LS Boost Projects
- Confirm engine code (LS1, LS2, LS3, LS6, LS7, etc.), bore spacing, and deck height. Some kits list broad compatibility, while others require adapters or port matching.
- Roots-style kits typically deliver strong low- to mid-range boost, ideal for street performance. If you aim for higher peak power, consider alternatives or bigger pulley options, always weighing reliability and fuel requirements.
- Increased air requires proper fuel delivery and ignition timing tuning. Ensure fuel pumps, injectors, and engine management can support the chosen boost level.
- If you run carbureted LS setups, verify whether the kit includes carb adapters and whether your carburetor size matches the intake design.
- Bolt-on kits can simplify installation, but many forced-induction setups require a tuned exhaust, intercooling, and careful belt/pulley management.
- Billet components, high-quality gaskets, and robust pulleys improve long-term reliability under boost, particularly in hot, race-friendly environments.
- Ports and vacuum lines must seal well to prevent leaks that erode boost pressure and fuel efficiency. Consider sealing caps or gaskets for idle and MAP ports.
- Factor in ancillary parts not included in complete kits, such as fuel system upgrades, headers, and belts. Plan for maintenance under boost conditions.
Frequently Asked Questions
- What LS engines are best for a supercharger? LS blocks from 4.8L to 6.2L are common targets. Choose a kit that explicitly lists your engine family (LS1, LS2, LS3, LS6, LS7, etc.).
- Do I need a tune after installing a supercharger? Yes. A proper tune ensures reliable timing, fueling, and boost calibration for your engine and boost level.
- Will a Roots-style kit require fuel upgrades? Often yes. Increased air requires additional fuel, so verify fuel pump capacity and injector sizing for your boost target.
- Can I run a supercharger with a carburetor? Some kits provide carb adapters; ensure your carburetor size and manifold support the intended boost and carb type.
- Are torque and horsepower gains guaranteed? Gains depend on engine condition, supporting systems, and tuning. Always verify expectations with a qualified installer.
- What about reliability under boost? Billet components, robust pulleys, and sealed ports improve longevity. Regular maintenance and heat management are crucial.