Introduction: Turbocharging the Honda S2000

The Honda S2000 remains one of the most celebrated sports cars of the early 2000s, thanks to its naturally aspirated F20C and F22C engines that rev to 9,000 RPM and deliver an intoxicating driving experience. However, for many enthusiasts, the pursuit of greater power inevitably leads to forced induction. Turbocharging the S2000 not only unlocks substantial horsepower gains but transforms the character of the car, providing wave-like torque that the factory setup lacks below 6,000 RPM.

Selecting the right turbo kit is critical. A poorly matched system can lead to reliability issues, overheating, or a frustrating driving experience. The kits featured here represent the best options for achieving 300 to 500 wheel horsepower, a range that preserves drivability while delivering eye-opening performance. Below, we break down each kit's strengths, ideal applications, and what you need to know before purchasing.

Note: All horsepower figures in this guide are approximate and depend on engine condition, supporting modifications, tuning quality, and fuel type. Always consult with a professional tuner before finalizing your setup.

1. HKS GT Supercharger Kit

While the title emphasizes turbo kits, the HKS GT Supercharger Kit deserves top billing because it represents the gold standard for reliable, street-friendly forced induction on the S2000. HKS has been a dominant force in Japanese performance engineering for decades, and their supercharger system for the S2000 reflects that legacy.

Power Output and Performance Characteristics

The HKS GT Supercharger Kit reliably produces between 350 and 400 wheel horsepower on a well-maintained engine with appropriate tuning. Unlike turbochargers, superchargers deliver immediate, linear power with no lag. This characteristic makes the HKS kit especially appealing for drivers who prioritize throttle response and want a powerband that mimics a larger-displacement naturally aspirated engine.

Key Components Included

  • Centrifugal supercharger unit with internal step-up gearing for high efficiency
  • Cast aluminum intake manifold with integrated bypass valve
  • Air-to-air intercooler for consistent intake temperatures
  • High-flow fuel injectors and fuel pressure regulator
  • HKS F-Con V Pro piggyback ECU or compatible tuning solution
  • All necessary hoses, brackets, and hardware for a complete installation

Installation Complexity

Installation is considered intermediate-level. Most experienced DIY mechanics can complete the job over a weekend. The kit is designed to be a direct bolt-on, meaning no fabrication or welding is required. HKS provides detailed instructions, and many online forums have build threads documenting the process step by step.

Who Is This Kit For?

The HKS GT Supercharger is ideal for drivers who want 300-400 horsepower with maximum reliability and minimal complexity. If you plan to track your S2000 frequently or want a system that behaves consistently in all weather conditions, this kit should be at the top of your list. The supercharger also produces a distinct whine that many enthusiasts find addictive.

Estimated Price: Approximately $5,000 - $5,500 depending on retailer and included tuning options.

2. GReddy Turbo Kit

GReddy (Trust) is another titan of Japanese performance parts, and their turbo kit for the S2000 has been a staple in the community for years. The GReddy kit is known for delivering strong mid-range torque while maintaining the engine's willingness to rev.

Power Output and Performance Characteristics

Depending on boost pressure and tuning, the GReddy turbo kit produces between 350 and 500 wheel horsepower. At conservative boost levels (around 8-10 PSI), the kit delivers approximately 380 horsepower with excellent reliability. Cranked up with proper fuel system upgrades and aggressive tuning, 500 horsepower is achievable, though engine longevity at this level requires careful attention to maintenance.

Turbocharger Details

The heart of the GReddy kit is a T67-25G turbocharger, which offers a good balance of quick spool and top-end flow. The T67 family is well-proven in the aftermarket world, and the 25G compressor trim provides responsive boost onset beginning around 3,500 RPM, with full boost by 5,000 RPM. This means you get meaningful power gains well before the VTEC engagement point.

What's in the Box

  • T67-25G turbocharger with wastegate actuator
  • Cast iron exhaust manifold designed for durability and heat management
  • Large front-mount intercooler with aluminum piping
  • Downpipe and exhaust components to connect to your existing cat-back system
  • Blow-off valve (recirculating type recommended for street use)
  • Oil feed and drain lines with necessary fittings
  • Intake piping and air filter

Tuning Requirements

The GReddy kit requires a standalone ECU or a high-quality piggyback system. Popular choices include the AEM Infinity, Haltech Elite 750, or Hondata K-Pro with an adapter harness. Professional dyno tuning is strongly recommended to ensure safe air-fuel ratios and ignition timing across the entire RPM range.

Estimated Price: Approximately $4,800 - $5,200.

3. AEM Turbo Kit

AEM (Advanced Engine Management) is best known for their engine management systems and high-performance intake products. Their turbo kit for the S2000 reflects a comprehensive engineering approach, integrating components that work together seamlessly.

Power Output and Performance Characteristics

The AEM turbo kit delivers between 300 and 450 wheel horsepower, with the majority of users reporting figures around 400 horsepower on pump gas with conservative tuning. The power delivery is smooth and progressive, thanks to careful turbo sizing and manifold design. Unlike some kits that produce a violent surge of power, the AEM kit feels refined and controllable, making it an excellent choice for daily-driven S2000s.

Component Quality and Design Philosophy

AEM uses a Garrett GT3076R turbocharger, which is widely regarded as one of the most durable and efficient turbochargers available. The GT3076R features a dual-ball-bearing center section for quick spool and long service life. The exhaust manifold is constructed from 304 stainless steel and designed to promote equal exhaust gas flow from all four cylinders, which helps with both performance and reliability.

Fuel System Integration

One of the standout features of the AEM kit is the inclusion of high-flow fuel injectors (typically 750cc or 1000cc depending on the version) and a fuel pressure regulator. This ensures that the fuel system is not a bottleneck when pushing toward the 450 horsepower mark. The kit also includes a Walbro 255 LPH fuel pump, which is the de facto standard for high-performance Honda applications.

Who Is This Kit For?

The AEM turbo kit is an excellent choice for enthusiasts who want a complete, integrated solution with high-quality components from a single source. The inclusion of a Garrett turbocharger and comprehensive fuel system upgrades means fewer compromises and less need to piece together additional parts. If you value engineering integrity and want a system that is well-documented with strong community support, this kit is a compelling option.

Estimated Price: Approximately $4,200 - $4,800.

4. Comptech Supercharger Kit

Comptech (now owned by Jackson Racing) has been a household name among Honda enthusiasts for decades. Their supercharger kit for the S2000 is one of the few roots-type supercharger systems available for this platform, offering a completely different driving feel compared to centrifugal superchargers or turbochargers.

Power Output and Performance Characteristics

The Comptech supercharger kit produces up to 400 wheel horsepower, with typical installations landing around 360-380 horsepower on pump gas. The roots-type supercharger provides instant boost from idle, resulting in tremendous low-end and mid-range torque. This fundamentally changes how the S2000 drives, giving it the punch of a small V8 rather than a peaky four-cylinder.

Roots vs. Centrifugal Supercharging

Understanding the difference between roots-type and centrifugal superchargers is key to deciding if the Comptech kit is right for you. A roots supercharger sits on top of the intake manifold and displaces a fixed volume of air with each revolution, creating boost almost immediately. This provides exceptional throttle response and low-RPM power. However, roots superchargers generate more heat than centrifugal units, and they tend to lose efficiency at very high RPM, which is why peak horsepower is often lower than similarly-priced turbo systems.

Installation and Reliability

The Comptech kit is one of the easiest forced induction systems to install on the S2000. It uses the factory intake manifold location and requires minimal modification to the engine bay. Reliability is excellent, as the supercharger is driven by a belt and does not place extreme heat stress on the exhaust system. Many owners report 50,000+ miles of trouble-free operation with proper maintenance.

Ideal Applications

The Comptech supercharger is perfect for autocross, track days, and spirited street driving where instant power is valued over top-end peak numbers. If you enjoy the feeling of massive torque at 3,000 RPM rather than waiting for VTEC at 6,000 RPM, this is the kit for you.

Estimated Price: Approximately $5,500 - $6,000.

5. Full-Race Turbo Kit

Full-Race Motorsports has built a reputation for producing some of the highest-quality turbo manifolds and complete turbo kits in the industry. Their S2000 kit is engineered for serious performance and is the most capable system on this list, but it also requires the most supporting modifications and tuning expertise.

Power Output and Performance Characteristics

The Full-Race turbo kit is designed to handle between 450 and 600 wheel horsepower with appropriate supporting modifications. At the lower end of the range (450 horsepower), the kit is controllable and surprisingly streetable. At the upper end (600+ horsepower), you are entering dedicated race car territory, requiring upgraded internals, a built transmission, and significant fuel system modifications.

Turbocharger Options

Full-Race offers the kit with several turbocharger options, but the most popular choices are the Garrett GTX3076R Gen II and the BorgWarner EFR 8374. Both are modern, high-efficiency turbochargers with billet compressor wheels and dual ball bearings. The EFR 8374, in particular, features a titanium-aluminide turbine wheel for extremely fast spool and excellent thermal characteristics.

Manifold Design and Quality

The hallmark of any Full-Race kit is the exhaust manifold. Constructed from schedule 10 304 stainless steel and TIG-welded by skilled fabricators, the manifold is designed to provide equal-length runners for optimal exhaust pulse energy. This translates to quicker spool, better transient response, and more consistent power delivery. The manifold is also available with ceramic coating, which reduces under-hood temperatures significantly.

What You Need Beyond the Kit

  • Standalone ECU - AEM Infinity or Haltech Elite 1500 are popular choices
  • Fuel system upgrades - Larger injectors (1000cc or larger), upgraded fuel pump, and possibly a return-style fuel system
  • Clutch upgrade - The stock clutch will not hold 450+ horsepower
  • Cooling system upgrades - Larger radiator and oil cooler are highly recommended
  • Engine internals - For 500+ horsepower, forged pistons and connecting rods are strongly recommended

Who Is This Kit For?

The Full-Race turbo kit is for the dedicated enthusiast who is building a purpose-driven S2000, whether for time attack, drag racing, or simply the pursuit of extreme horsepower. This is not a "bolt on and forget it" system; it requires careful planning, professional installation, and a commitment to ongoing maintenance. However, for those willing to invest the time and money, the results are spectacular.

Estimated Price: Approximately $6,500 - $7,500 depending on turbocharger selection and options.

Comparing the Top 5 S2000 Turbo Kits at a Glance

Kit Type Horsepower Range Estimated Price Best For
HKS GT Supercharger Centrifugal Supercharger 350-400 HP $5,000 - $5,500 Reliability, linear power, street driving
GReddy Turbo Turbocharger 350-500 HP $4,800 - $5,200 Strong mid-range, proven design
AEM Turbo Turbocharger 300-450 HP $4,200 - $4,800 Integrated kit, Garrett turbo, daily driving
Comptech Supercharger Roots Supercharger 360-400 HP $5,500 - $6,000 Instant torque, autocross, ease of installation
Full-Race Turbo Turbocharger 450-600+ HP $6,500 - $7,500 Maximum power, track use, built engines

Critical Supporting Modifications for Any S2000 Forced Induction Build

Installing a turbo or supercharger kit is only part of the equation. To achieve reliable performance in the 300-500 horsepower range, the following supporting modifications should be considered mandatory:

Engine Management

All of the kits listed above require a standalone ECU or a high-quality piggyback system. The factory ECU cannot properly manage boosted operation, and attempting to run a turbo kit without proper engine management is a recipe for engine failure. The AEM Infinity Series and Haltech Elite series are two of the most popular choices for the S2000, offering extensive tuning capabilities and excellent community support.

Fuel System Upgrades

The stock fuel pump and injectors are insufficient for any forced induction application. A Walbro 255 LPH or AEM 340 LPH fuel pump, along with injectors sized appropriately for your power goals (typically 750cc to 1000cc), are essential. For builds targeting over 450 horsepower, a return-style fuel system with a boost-referenced fuel pressure regulator is highly recommended.

Cooling System

Forced induction generates significantly more heat than the naturally aspirated engine was designed for. A larger aluminum radiator, high-flow thermostat, and electric fans are strongly recommended. For track use, an oil cooler is essential to maintain safe oil temperatures during extended high-load operation.

Clutch and Drivetrain

The stock S2000 clutch begins to slip around 350-380 wheel horsepower. A stage 2 or stage 3 clutch from manufacturers like ACT, Exedy, or Competition Clutch is necessary to handle increased torque. The differential and axles are generally robust up to about 450 horsepower, but beyond that, upgraded axles should be considered.

Frequently Asked Questions About S2000 Turbo Kits

Can I run a turbo kit on a stock S2000 engine?

Yes, with careful tuning and conservative boost levels (up to approximately 400 wheel horsepower), the stock F20C and F22C engines can be reliable. The key is proper tuning, high-quality fuel, and avoiding detonation. Many owners have driven 50,000+ miles on stock internals at the 350-400 horsepower level. Beyond 450 horsepower, forged pistons and connecting rods are strongly recommended.

Which kit is easiest to install?

The Comptech supercharger kit is generally considered the easiest to install, as it replaces the factory intake manifold and does not require extensive exhaust system modifications. Among the turbo kits, the AEM kit is well-regarded for its comprehensive documentation and bolt-on design.

Do I need to upgrade my brakes if I add a turbo kit?

While not strictly required, upgrading brakes is highly recommended when significantly increasing power. The S2000's factory brakes are adequate for street driving but can fade under heavy use when the car is substantially faster. Consider upgrading to larger rotors, performance brake pads, and high-temperature brake fluid.

Will a turbo or supercharger affect my S2000's resale value?

This depends on the buyer. Some enthusiasts specifically seek out modified cars, while others prefer unmodified examples. A well-installed, professionally tuned system with documentation generally adds value to the right buyer, while a poor installation can significantly reduce value. Keep all receipts and tuning files to demonstrate the quality of the build.

External Resources and Further Reading

Final Thoughts: Choosing the Right Kit for Your Goals

The S2000 is a remarkable platform that responds exceptionally well to forced induction. Whether you choose the refined linearity of the HKS supercharger, the proven mid-range punch of the GReddy turbo, the integrated engineering of the AEM kit, the instant torque of the Comptech supercharger, or the extreme capability of the Full-Race turbo system, you are investing in a transformative driving experience.

Start by defining your power goals honestly. If you want a reliable, daily-drivable car with 350-400 horsepower that you can enjoy on weekends and occasionally at the track, the HKS or AEM kits are excellent choices. If you are building a dedicated performance machine and have the budget for supporting modifications, the Full-Race kit offers headroom that nothing else in this segment can match.

No matter which path you choose, invest in professional tuning, high-quality supporting modifications, and proper maintenance. A well-built turbocharged S2000 is an exhilarating machine that rewards careful planning and execution with every drive.