If you’re searching for a powerful, bolt-on boost for a 6.0L GM LQ4-powered truck or SUV, a 6-71 Roots-style supercharger kit is a common and effective option. These kits are designed to deliver substantial horsepower gains while keeping street manners intact. The top picks below emphasize LS-family compatibility and availability across related GM platforms, helping you choose a kit that best matches your engine family and intended use. This guide highlights five compatible kits, who they’re best for, and practical considerations to help you decide.
Summary Table of Selected Products
| Product | Core Benefit | Best For | Notes |
|---|---|---|---|
| Complete 6-71 Roots Supercharger Kit for GM LS Blocks | 45-55% HP increase | GM LS-powered builds seeking significant street boost | Carb adapter supports dual 4-barrel carbs |
| Complete 6-71 Roots Supercharger Kit for Big Block Chevy BBC | 45-55% HP increase | Big Block Chevy builds wanting robust performance | Fits standard-deck BBC blocks |
| Complete 6-71 Roots Supercharger Kit for Mopar Big Block | 45-55% HP increase | Mopar Big Block projects | Standard-deck Mopar BB options |
| Complete 6-71 Roots Supercharger Kit for Mopar Small Block LA | 45-55% HP increase | Mopar small- and mid-block builds | Solid bolt-on for various Mopar SB blocks |
| Turbo Install Hardware Kit for 6.0L Ford Diesel | Hardware upgrade option | Diesel engine installs and replacements | Not for GM LS/LQ4; shows cross-compatibility considerations |
Complete 6-71 Roots Supercharger Kit for GM LS Blocks
This kit is designed for GM LS engines, including the common LS family that powers many 6.0L LQ4 builds. It includes a complete 6-71 Roots-style supercharger, intake manifold, snout, 50T/55T Gilmer pulleys, idler with bracket, 3-inch belt, V-belt crank pulley, dual-carb adapter, and all gaskets. Best for LS-powered street cars and trucks seeking reliable, substantial torque and horsepower gains. The dual-carb adapter supports 4-barrel square-bore carbs (600-850 cfm typical).
Best for: LS-based builds that want a straightforward bolt-on with a proven Roots design and strong mid-to-high RPM performance. Choose this if you plan for street driving with daily usability and want the compatibility across common LS deck heights.
Caution: Verify rotating assembly compatibility for sustained race use and ensure correct carburetor setup to realize the horsepower gains described. Carbs and fuel system components are sold separately.
Complete 6-71 Roots Supercharger Kit for Big Block Chevy
This kit targets big-block Chevy engines, including the 396/402/427/454/496/502 family. It delivers 45-55% horsepower increases with a complete bolt-on assembly that includes the blower, intake manifold, snout, gilmer pulleys, idler with bracket, belt, crank pulley, dual-carb adapter, and all gaskets. It’s designed for standard-deck BBC blocks and features a dual-carb compatibility option for broader tuning.
Best for: Big Block Chevy enthusiasts who want a robust, street-friendly boost with proven Roots architecture and straightforward installation. Choose this if your engine is a BBC and you want a classic high-displacement torque curve.
Limitation: Carbs and fuel components are sold separately, so plan for a complete fuel system upgrade compatible with dual carbs.
Complete 6-71 Roots Supercharger Kit for GM LS Blocks (Another LS Option)
This Speedmaster kit mirrors the LS-focused Roots approach, offering the same core components tailored for LS1/LS2/LS3/LS6/LS7 and newer LS blocks, including 50T/55T Gilmer pulleys and a complete bolt-on kit that includes all required gaskets. It is compatible with numerous LS-based platforms frequently paired with 6.0L LQ4 builds.
Best for: Drivers building a modern LS-powered 6.0L engine with an emphasis on broad block compatibility and consistent street performance. It’s a strong alternative when availability or pricing differs between LS variants.
Limitation: Verify carburetor choices if you plan to run dual carb setups; adapters and fuel system choices must align with your carburation plan.
Complete 6-71 Roots Supercharger Kit for Mopar Big Block
This Speedmaster kit targets Mopar big-block engines (361/383/400/413/426/440) with a complete bolt-on configuration that mirrors the other 6-71 Roots systems. It provides a consistent boost profile and includes the blower, intake manifold, snout, 50T/55T Gilmer pulleys, idler with bracket, 3-inch belt, crank pulley, dual-carb adapter, and all gaskets. Carbs and fuel components are sold separately.
Best for: Mopar BB enthusiasts who want torque-rich performance and a proven Roots approach, with a straightforward fit on standard-deck Mopar blocks.
Limitation: Not designed for GM LS or BBC engines; ensure engine compatibility before purchase.
Complete 6-71 Roots Supercharger Kit for Mopar Small Block (LA)
This Speedmaster kit focuses on Mopar small-block engines (273/318/340/360) with the same complete bolt-on design as the other 6-71 Roots kits. It fits standard-deck Mopar SB blocks and includes the blower, intake manifold, snout, 50T/55T Gilmer pulleys, idler with bracket, 3-inch belt, crank pulley, dual-carb adapter, and all gaskets. Carbs and fuel system components are separate purchases.
Best for: Mopar SB builders who want strong throttle response and a robust boost profile without major engine work. Choose this if your project uses a Mopar SB and you want a proven Roots boost solution.
Limitation: Like the other non-GM kits, this is not compatible with GM LS/LQ4 blocks; ensure engine family alignment before buying.
Buying Guide: How To Choose The Right 6-71 Roots Kit For a 6.0L LQ4
- Engine family compatibility: For a 6.0L LQ4 or other GM LS-based builds, prefer LS-block kits or BBC-appropriate options if you’re using a non-LS Big Block Chevrolet engine.
- Horsepower gain expectations: Most complete 6-71 Roots kits offer 45-55% horsepower increases. Verify your fuel system and tuning plan to realize the full gain.
- Carburetion and fueling: Dual 4-barrel carb adapters require suitable carburetors and fuel upgrades. Plan the fuel system in advance to match your power goals.
- Support and compatibility: If you’re keeping a stock-style intake or upgrading to aftermarket manifolds, ensure the kit includes the correct intake manifold and gaskets for your engine block type.
- Installation scope: These are bolt-on kits, but some engines may require additional intercooler, fuel, or timing adjustments. Factor in your preferred level of modification and tuning.
FAQ
- Q: Will a 6-71 Roots kit fit a 6.0L LQ4 engine?
- A: Yes, but you’ll want a kit designed for GM LS blocks or compatible LS variants; verify item compatibility with your exact LQ4 build and block type.
- Q: Do these kits include fuel system components?
- A: No. Most kits include the blower assembly and hardware, while carbs, injectors, and fuel rails are sold separately or require adapters.
- Q: Is carburetion required for all these kits?
- A: Some kits use dual 4-barrel carb adapters; verify whether you’ll run carbs or switch to fuel-injection and plan accordingly.
- Q: Are there any common limitations?
- A: The primary limitations are compatibility with engine family, carburation choices, and the need for supporting fuel and tuning upgrades to achieve maximum gains.
- Q: Which kit is best for daily driving?
- A: For a 6.0L LQ4 or LS-based daily driver, the LS-compatible kit with good throttle response and reliable street manners is typically preferred.