When choosing a supercharger for GM LS engines, the goal is to boost horsepower reliably while preserving driveability. The top picks below are best for different buyer needs: street-driven enthusiasts seeking concrete gains, gearheads upgrading multiple LS variants, and those who want bolt-on, race-ready setups. This guide highlights five strong candidates, explains who they’re best for, and notes practical limitations to consider before purchase.
| Product | Best For |
|---|---|
| Complete 6-71 Roots Supercharger Kit | All LS blocks; street-to-track boost with comprehensive kit |
| Dirty Dingo LS Billet Turbo Oil Feed Complete Kit | Turbo or supercharger builds needing a clean oil-feed solution |
| OywhC MAP Vacuum Port Sealing Cap (Black) | Engine seal protection and port maintenance for LS family |
| Edelbrock 1564 Supercharger Assembly | GM SUV/Gen IV LS builds seeking moderate, reliable boost |
| DJTuning Gen IV LS Rectangle Port Adapter | Adapter integration for specific supercharger layouts |
6-71 Roots Supercharger Kit for GM LS
Best for: LS engines requiring a complete, bolt-on roots-style boost with substantial horsepower gains. This kit advertises 45-55% horsepower increases and includes the blower, intake manifold, pulleys, belt, and gaskets, making it a self-contained option for a broad array of LS blocks (LS1, LS2, LS3, LS6, LS7, and their sub-displacements). Why selected: the package is designed for a plug-and-play experience with a double-pinned rotor design and factory-timed boost for consistent performance.
Key considerations: It is a full bolt-on kit, but users must verify rotating assembly suitability for sustained race use. Carburetor adapters are included for dual 4-barrel square-bore setups, with carbs and fuel system components sold separately. Best used where a user wants a straightforward, streetable boost solution that can be tuned for street and race environments.
Caution: Potential fitment questions exist for certain rotating assemblies, and installation complexity can vary with engine bay constraints. This kit is ideal for builders who want a robust, integrated supercharger solution and are comfortable with extra components like carb adapters and gaskets.
Dirty Dingo LS Billet Turbo Oil Feed Complete Kit
Best for: Builders integrating a turbo or supercharger with a clean, CNC-machined billet oil feed solution. Why selected: The kit provides a billet aluminum oil feed line setup that can simplify plumbing for forced-induction systems, improving reliability in high-boost applications.
Key considerations: This is a specialized kit focused on the oil feed portion; ensure compatibility with your specific turbo or supercharger arrangement. Best used when oil-feed reliability is a priority and space permits the integrated lines and fittings.
Caution: Some users may need additional hardware or fittings depending on their engine bay layout and chosen blower/turbo components. Choose this if oil-line precision and build cleanliness are a priority in a performance setup.
OywhC MAP Vacuum Port Cap (Black)
Best for: LS, LSA, LT4, LSX, and related engines needing a reliable MAP port sealing solution. Why selected: It seals MAP sensor ports to prevent air leaks that can hurt intake efficiency, a common issue in forced-induction setups where ports are exposed during maintenance or upgrades.
Key considerations: Verified port hole spacing is important before purchase. Made from T6061 aluminum with CNC precision and an anodized finish for durability. This product is a maintenance and reliability accessory rather than a power-adding part, but it supports consistent boost delivery in high-boost builds.
Caution: Ensure the port locations match your engine configuration; wrong fitment can impede sealing effectiveness and boost consistency.
Edelbrock 1564 Supercharger Assembly
Best for: GM SUV and Gen IV LS engines requiring a balanced, moderate boost with reliable performance. Why selected: Edelbrock’s setup targets a practical boost level with clear maximum horsepower and torque figures (384 RW HP, 390 RW ft-lb, with 6 psi boost), making it a solid choice for daily-driven or light-track applications.
Key considerations: This assembly is designed for a specific engine family and application; confirm compatibility with your vehicle layout and required mounting configuration. It emphasizes dependable performance over extreme top-end horsepower.
Caution: The stated horsepower and torque figures come from a controlled spec context; real-world gains depend on supporting components (fuel, exhaust, intercooling, tuning). Choose this if you want a proven, accessible route to bolstered LS performance without extreme boost levels.
DJTuning Gen IV LS Rectangle Port Adapter
Best for: Builders needing a rectangle port adapter to connect specific supercharger configurations to Gen IV LS cylinder heads. Why selected: This kit includes multiple adapter plates and seals to facilitate a clean, secure interface between engine and supercharger. It supports precise alignment and sealing for reliable boost delivery.
Key considerations: It includes two adapter plates, 10 bolts, and multiple seals to ensure robust mounting. Consider your chosen blower and port style when evaluating fit and sealing requirements for optimal performance.
Caution: Assembly complexity can vary; ensure you have compatible hardware and a clear plan for sealing interfaces to avoid air leaks under boost.
Buying Guide: How to choose the right LS supercharger setup
- Define your goals: Do you want the biggest peak horsepower, better mid-range torque, or a balance for street use? Different kits are tuned for different outcomes.
- Consider engine compatibility: Verify that the kit supports your exact LS variant (LS1, LS2, LS3, LS6, LS7, 4.8L, 5.3L, 6.0L, 6.2L) and compatible deck height.
- Boost level and driveability: Roots-style blowers typically deliver strong throttle response and broad torque, while turbo or adapter-focused kits may offer different power curves. Choose based on how you drive most.
- Supporting hardware: Some kits require carburetor adapters, fuel system upgrades, intercooling, exhaust changes, or tuned ECM/ECU mappings. Plan for these additions when budgeting.
- Installation complexity: Bolt-on kits vary in difficulty. Consider your garage setup, tools, and whether professional installation is preferred.
- Reliability and maintenance: Look for components with proven fit and durable materials (aluminum, gaskets, seals). Ensure you have a reliable oil feed or lubrication plan for forced-induction components.
- Port and seal integrity: Sealing caps and port adapters help prevent leaks, especially in high-boost builds. Verify port spacing and compatibility before buying.
Frequently Asked Questions
- What LS engine should I choose a Roots-style supercharger for?
Roots-style kits are often selected for broad, street-usable torque increases across LS1 to LS7 families and accompanying displacement variants. They provide strong throttle response and readily tunable boost.
- Do I need a fuel system upgrade with a supercharger kit?
Yes, most installations require supporting changes to fuel delivery, injectors, and tuning to maintain safe air-fuel ratios under boost. Reference the kit’s included components and plan for your fuel strategy.
- Are MAP port sealing caps important for LS boosted builds?
Yes, sealing caps prevent unmetered air leaks and keep intake flow consistent, which helps maintain stable boost and engine efficiency during maintenance or upgrades.
- Can I install a supercharger kit myself?
Installation difficulty varies by kit and engine layout. Bolt-on kits are designed for DIY setups with the right tools, while others may benefit from professional alignment and tuning.
- What should I consider when choosing an adapter for rectangle port engines?
Adapter compatibility with your blower model and Gen IV rectangle ports is crucial. Look for included mounting hardware and seals to ensure a solid, leak-free fit.
- What is the typical boost range I should expect with these LS kits?
Boost ranges vary by kit, engine, and tune. Plants in the 6-psi range are common for moderate street use, but specific numbers depend on supporting modifications and tuning strategy.