The Honda S2000 occupies a hallowed place in the sports-car world. Its 2.0-liter F20C (later 2.2-liter F22C) engine is legendary for its stratospheric redline, precise VTEC engagement, and naturally aspirated power delivery. Yet for many enthusiasts, the stock output—240 or 237 horsepower in U.S. spec—leaves the chassis wanting more. Adding a forced induction system, particularly a turbocharger, transforms the S2000 into a different animal: one that retains its razor-sharp balance while delivering crushing acceleration. Choosing the right turbo kit is critical, and the market offers several proven brands. Below we examine the leading options, the technology behind them, and the factors that determine a successful installation.

Understanding S2000 Turbocharging

Before diving into specific kit manufacturers, it is important to understand what makes the S2000 engine a good—and challenging—platform for turbocharging. The F20C and F22C feature high compression ratios (11.0:1 and 11.1:1 respectively), which amplify low-end torque but also increase the risk of detonation under boost. A well-designed turbo kit must therefore manage compression, fuel delivery, and ignition timing with precision. Modern kits address this through low-boost setups (6–9 psi) that produce safe, reliable power in the 300–400 whp range, while more aggressive builds with built internals can exceed 600 whp. The critical components of any kit include a turbocharger, exhaust manifold, wastegate, blow-off valve, intercooler, piping, and a tuning solution (standalone ECU or reflash). Reputable brands engineer these parts to work together, reducing guesswork and installation headaches.

SP Engineering Turbo Kits

SP Engineering, based in California, has earned a strong reputation among S2000 owners for comprehensive, bolt-on turbo systems. Their kits are designed for straightforward installation while delivering substantial power gains. The company offers several variants targeting different output levels, from a “stage 1” kit producing 350 whp to a “stage 3” kit capable of 600+ whp with supporting modifications.

Key Features of SP Engineering Kits

  • Precision T4/T61 or similar turbochargers: SP Engineering pairs their kits with journal-bearing or ball-bearing turbochargers sized to minimize lag while supporting the target horsepower. Their mid-range kit often uses a Garrett GT3582R or equivalent.
  • 304 stainless steel manifolds: The exhaust manifold is a T4 divided design, cast or fabricated from stainless steel, with proper wastegate placement for consistent boost control.
  • High-flow intercoolers: Bar-and-plate cores with cast end tanks ensure efficient heat exchange, keeping inlet air temperatures in check during hard driving.
  • Oil and coolant lines included: SP Engineering provides AN fittings and braided lines for turbo oil feed and drain, plus water lines for water-cooled turbochargers.
  • Optional tuning: Kits often ship with a base calibration for the factory ECU (via a Hondata FlashPro or similar) or a standalone ECU option like an AEM EMS. SP Engineering offers remote or dyno tuning support.

SP Engineering’s customer base reports excellent drivability and reliability when the kit is installed correctly and tuned on a conservative boost level. The company also backs its products with technical support and a warranty against manufacturing defects.

BorgWarner Turbo Kits

BorgWarner is a global leader in turbocharger technology, supplying OEMs and the aftermarket. Their EFR (Engineered For Racing) series is especially popular for the S2000 because of its advanced features: dual ball bearings, a billet compressor wheel, an integrated recirculation valve, and a titanium-aluminide turbine wheel option for reduced inertia. While BorgWarner does not sell complete bolt-on kits directly, many top-tier fabricators create S2000-specific kits around BorgWarner EFR turbos.

Why BorgWarner EFR Stands Out

  • Dual ball bearing cartridge: This reduces friction at cold start and high RPM, allowing quicker spool than conventional journal bearings. The EFR’s ball bearing system is sealed and requires no external oil cooling.
  • Integrated recirculation valve: The built-in bypass valve eliminates the need for an external blow-off valve on most setups, keeping the system compact and reducing potential boost leaks.
  • Cast stainless turbine housings: Available in multiple A/R ratios to match the desired power band—a smaller A/R for faster spool on street cars, larger A/R for top-end power on track cars.
  • Speed sensor option: Some EFR units include a speed sensor that can be fed to a standalone ECU for advanced boost control and safety strategies.

Complete kits from companies like Full-Race Motorsports (who use BorgWarner EFR units) are designed specifically for the S2000, offering a tubular manifold, intercooler piping, and all necessary hardware. These kits typically target 400–500 whp on pump gas with proper tuning. The BorgWarner EFR’s reputation for responsiveness and reliability makes it a top choice for S2000 owners who prioritize daily drivability alongside high-power capability.

Other Leading Brands

Beyond SP Engineering and BorgWarner-based setups, several other manufacturers produce well-proven S2000 turbo kits. Each has its own design philosophy and strengths.

Greddy (Trust)

Greddy’s S2000 turbo kits are among the most popular due to their complete nature and competitive pricing. The Greddy T518Z kit is a classic, producing around 300–350 whp on a near-bolt-on basis. The kit includes a cast-iron manifold, Greddy-spec turbocharger, intercooler, piping, and a Blow-Off Valve. Greddy also offers larger kits with T67 turbos for 500+ whp. Their focus is on reliability and ease of installation, making them a good entry point for first-time turbo S2000 owners.

HKS

HKS’s GT series turbochargers, such as the GT2835 and GT3037, are common in custom S2000 setups. HKS itself does not produce a full “kit” for the S2000, but many fabricators use HKS turbos in their builds. HKS’s reputation for precision engineering and durability makes them a go-to for high-boost applications. The HKS Super SQV blow-off valve is also a popular add-on for any S2000 turbo system.

Full-Race Motorsports

Full-Race is a boutique fabricator that offers complete S2000 turbo kits using BorgWarner EFR or Garrett turbochargers. Their kits are known for their high-quality workmanship: TIG-welded stainless steel manifolds, silicone couplers with T-bolt clamps, and precise routing to clear the chassis. Full-Race kits are not cheap, but they are often considered the gold standard for street and track S2000s.

Turbokits.com

Turbokits.com provides a range of S2000 turbo systems, from entry-level to high-end. They offer custom sizing options and can build kits around a turbo of the buyer’s choice. Their kits typically use cast-iron manifolds for durability and include a front-mount intercooler, wastegate, and blow-off valve. Customer support is responsive, and they offer tuning assistance via the AEM or Hondata platforms.

Key Considerations When Choosing a Turbo Kit

Selecting the right kit goes beyond brand preference. The following factors should guide your decision.

Power Goals

Decide on a realistic horsepower target. For a street-driven car with stock internals, stick to 350–400 whp. This range is achievable with a moderately sized turbo like a Garrett GT3076R or BorgWarner EFR 6258 on 9–10 psi, with proper tuning. For track use or ultimate power, you’ll need engine internal upgrades (forged rods, pistons, valves, springs) and a turbo capable of 500+ whp. Higher targets also require a larger intercooler, upgraded fuel system (injectors, pump, lines), and a stronger clutch.

Budget

Complete S2000 turbo kits range from $3,500 to $8,000+ depending on the brand and included components. Factor in additional costs: ECU tuning ($500–$1,000), installation labor ($1,000–$2,000 if not DIY), fuel system upgrades ($500–$1,500), clutch ($500–$1,500), and cooling system upgrades (radiator, oil cooler) if needed. A realistic total budget for a reliable 400 whp setup is $7,000–$10,000.

Installation Complexity

Some kits are truly bolt-on, requiring only basic mechanical skills, while others demand fabrication skills (e.g., welding intercooler piping, modifying the chassis). SP Engineering and Greddy market their kits as direct-fit for the S2000. Full-Race kits also fit without modification but may require more care during installation due to tighter clearances. If you are not comfortable with automotive work, budget for professional installation.

Tuning Options

The factory ECU can be tuned with a Hondata FlashPro or K-Pro (for the AP2). A standalone ECU like the AEM Infinity, Haltech Elite, or Motec offers more flexibility and safety features but adds cost and complexity. Ensure the kit you choose has a base map available or that you have access to a reputable dyno tuner.

Supported Modifications

A turbo kit alone is not enough. The S2000’s stock fuel pump and injectors are adequate for low-boost setups but will max out around 350 whp. For higher power, upgrade to 1000 cc+ injectors, a high-flow fuel pump (Walbro 450 or similar), and optionally a return-style fuel system. The clutch will slip on stock torque above 300 whp; plan for an upgraded clutch or flywheel. Cooling is also critical: a larger aluminum radiator with proper fans and an oil cooler help maintain safe temperatures during extended boosting.

Installation and Tuning Best Practices

Proper installation and calibration are essential for reliability. Follow these guidelines.

  • Check oil supply and return: The turbo must have a pressurized oil feed (from the engine block or oil filter adapter) and a gravity drain back to the oil pan. Use a -4 AN feed line and -10 AN return line for the S2000’s engine. Verify the drain angle is steep enough to avoid pooling.
  • Secure all boost connections: Use T-bolt clamps on silicone couplers, and ensure the intercooler piping does not rub against the chassis or engine. Heat wrap or ceramic coating on the exhaust manifold reduces underhood temperatures.
  • Fuel system mods: Run a dedicated fuel pressure regulator if using a return-style system. Wire the fuel pump with a relay to ensure proper voltage at high load.
  • ECU calibration: Have the car tuned on a dyno with wideband oxygen sensor feedback. Target an air/fuel ratio of 11.5–12.0:1 under boost for safety. Use a knock sensor (factory or aftermarket) to verify the tune is safe.
  • Driveability: A good tune will provide smooth part-throttle response and stable idle. Avoid aggressive timing advance until the engine is fully up to temperature.

Maintaining Reliability

The S2000’s engine can handle moderate boost if supporting systems are robust. Key reliability points include:

  • Oil cooling: High oil temperatures are common under boost. Install an oil cooler with a thermostat to maintain 200–220°F oil temperature.
  • Engine cooling: A Koyo or Mishimoto radiator, combined with a lower-temperature thermostat, prevents coolant overheating during sustained boosting.
  • Heat management: Wrap the downpipe and exhaust manifold with heat-rejecting tape or apply a ceramic coating. Consider turbo blankets to reduce radiant heat.
  • Regular maintenance: Change oil every 3,000 miles with a quality synthetic (5W-40 or 10W-40). Check for boost leaks and loose hardware periodically.
  • Ignition system: Upgraded spark plugs (one heat range colder than stock) are mandatory. Gap them to 0.025–0.028 inches for boosted operation.

Conclusion

The Honda S2000 rewards careful modification with driving experiences few other cars can match. Turbocharging done right—with a quality kit from brands like SP Engineering, a BorgWarner EFR–based system from a fabricator like Full-Race, or a Greddy setup—delivers a linear, relentless surge that synergizes with the chassis’s balance. The key is to plan your power target, budget for supporting parts, and invest in professional tuning. When executed properly, a turbocharged S2000 remains a thrilling, reliable machine capable of embarrassing far more expensive metal. For those willing to do the homework, the reward is one of the most satisfying driver’s cars on the road.