The 2G Eclipse (1995-1999) remains one of the most tunable platforms in the DSM community, and the EVO III 16G turbocharger has long been the go-to upgrade for enthusiasts chasing a reliable 70 horsepower increase without sacrificing daily drivability. While factory turbocharged models like the Eclipse GSX or GST came with a small T25 turbo, swapping to the Mitsubishi EVO III 16G is a proven path to a responsive, mid-range powerhouse. In this article, we break down every cost component of this upgrade — from the turbocharger itself to fuel system upgrades and tuning — so you can budget accurately and avoid surprises.

What Is the EVO III 16G Turbocharger?

The EVO III 16G is a factory turbo from the Mitsubishi Lancer Evolution III, a car known for its rally-bred performance. It features a larger compressor wheel and a revised turbine housing compared to earlier 16G variants, allowing it to flow more air and support higher boost levels. For a 2G Eclipse, this turbo bolts directly to the stock exhaust manifold with minor modifications, making it a popular "direct swap" upgrade. Spool characteristics are excellent — full boost arrives around 3,000–3,500 RPM — and it can safely support up to 350-400 horsepower with proper supporting modifications.

Why Choose This Upgrade for Your 2G Eclipse?

The 2G Eclipse’s stock turbo (either a T25 on GST/GSX or no turbo on non-turbo models) leaves a lot of performance on the table. The EVO III 16G provides a 70 HP increase over the factory T25 when paired with fuel and tuning upgrades. The power delivery is smooth and linear, not a peaky rush that overwhelms the drivetrain. For many owners, this upgrade represents the sweet spot between cost, complexity, and usable horsepower. It also responds well to boost controllers and larger intercoolers, giving you room to grow.

Detailed Cost Breakdown

Below is a component-by-component breakdown of what you can expect to spend. Prices are based on current market averages for new and high-quality used parts. Labor costs assume a professional shop install, but many enthusiasts perform the work themselves to save money.

1. EVO III 16G Turbocharger

Cost: $600 – $900

The turbo itself is the heart of the upgrade. You can find new OEM units (from Japanese surplus or aftermarket suppliers) or reputable rebuilds. Ported units with upgraded actuators cost more but improve spool and boost control. Avoid cheap no-name clones; they often suffer from poor balance and premature failure. A reliable source is ExtremePSI or supporting DSM vendor like DSMTuners classifieds.

2. Turbo Install Kit

Cost: $100 – $300

An install kit typically includes new gaskets (manifold-to-head, turbo-to-manifold, O2 housing), copper or stainless steel oil feed and drain lines, and sometimes studs or bolts. While you can reuse some factory parts, a kit eliminates guesswork and ensures a leak-free installation. Many kits (e.g., STM Performance) are designed specifically for the 2G Eclipse and EVO III 16G swap.

3. Upgraded Fuel Pump

Cost: $100 – $200

The factory 2G fuel pump is insufficient for the increased airflow of the EVO III 16G. A Walbro 255 lph or similar high-flow pump is required to maintain proper fuel pressure under boost. Installation is straightforward (drop-in unit) but requires rewiring for optimal voltage supply. A potential upgrade: the Walbro 450 if you plan for even more power later.

4. Fuel Injectors

Cost: $200 – $400

Stock injectors (likely 450cc on turbo models) will max out with a 16G on 15+ PSI. You need 550cc to 650cc injectors to safely deliver fuel for the 70 HP gain. Options include new Bosch EV14 injectors or used DSM 560s/680s. Be sure to match the injector type to your tuning solution (chip or standalone).

5. ECU Tuning

Cost: $300 – $600

Tuning is non-negotiable. Without proper air/fuel ratios and timing control, you risk engine damage. Options include:
– Chip flashing by a DSM specialist (Jacob from ECMTuning) for ~$300.
– ECMLink V3 (the gold standard) for $595 (used often). It gives real-time tuning and data logging.
– A basic SAFC (Super Air Fuel Converter) is a budget alternative but less comprehensive.
For first-time tuners, a base map from a reputable tuner (e.g., DSMLink) is highly recommended.

6. Labor Costs

Cost: $300 – $500 (if shop installs)

A professional shop that knows DSMs will charge 4–8 hours of labor. The work involves unbolting the stock turbo, swapping lines, installing the new turbo, and fitting the fuel pump/injectors. Many owners do this in a weekend at home, saving the entire labor cost. The job is not overly complex but requires basic mechanical skills and tools.

Additional Costs to Consider

Don't overlook these items — they improve reliability and performance:

  • Intercooler upgrade: $200 – $500. The stock side-mount intercooler (SMIC) can heat soak quickly. A front-mount intercooler (FMIC) kit from Punishment Racing or the ETS kit dramatically reduces intake temperatures.
  • Exhaust system: $200 – $600. A free-flowing 3-inch downpipe and cat-back exhaust help the turbo spool and reduce backpressure. Many 2G owners already have this.
  • Boost controller: $50 – $200. A manual boost controller (MBC) allows you to adjust boost safely. Electronic controllers add more features but aren't required for the initial 70 HP level.
  • Wideband O2 sensor gauge: $150 – $300. Critical for tuning and monitoring air/fuel ratios. An AEM or Innovate unit is a wise investment.
  • Engine health items: $50 – $200. Replace spark plugs (one step colder), wires, and possibly a new coolant thermostat while you're working.

Total Estimated Investment

Combining the core upgrade list with the most common additional items gives the following range:

  • Low-End Estimate (DIY, used parts, basic tuning): ~$1,700
  • High-End Estimate (professional install, new parts, intercooler & exhaust): ~$3,500

The sweet spot for most enthusiasts spending wisely is around $2,200 – $2,600, which includes a quality turbo, install kit, fuel pump, injectors, a wideband, and a boost controller — with you doing the labor.

Performance Gains and Real-World Expectations

With the EVO III 16G and supporting mods, expect a 70 HP increase at the wheels (from ~210 whp to ~280 whp on a well-tuned GST/GSX). Torque jumps to about 300 ft-lbs. More importantly, the car feels transformed: quicker spool, stronger mid-range, and no laggy top-end. The 70 HP figure is conservative — many see 80–100 HP gains with a more aggressive tune and FMIC. However, the stock block and drivetrain can handle up to about 400 HP, so this upgrade is very safe.

Boost levels: The stock T25 on 2Gs ran about 12 PSI. With the EVO III 16G, you can run 15–18 PSI safely on pump gas (93 octane) with the fuel system upgrades mentioned. Going higher requires race fuel or meth injection.

Installation Tips and Common Pitfalls

  • Oil drain line: The EVO III 16G uses a different drain flange than the T25. Use the install kit's line or modify the stock one — a kinked drain will cause smoke.
  • Coolant lines: You may need to reuse or modify the stock water lines; clearances can be tight near the firewall.
  • J-pipe: The EVO III 16G requires a different J-pipe (or an aftermarket lower intercooler pipe). Many kits include one, or you can buy a silicone coupler and aluminum pipe.
  • Boost creep: A ported wastegate or upgraded actuator (like the Forced Performance) prevents overboost creep — especially if running a full 3-inch exhaust.
  • Check engine health: Do a compression test and leak-down before installing the turbo. A weak engine won't tolerate extra boost.

For a detailed walkthrough, DSMTuners has a comprehensive guide.

Is the EVO III 16G Right for You?

This upgrade is ideal if you:

  • Own a 2G Eclipse GST or GSX (or FWD Spyder).
  • Want a reliable +70 HP without building the engine.
  • Are willing to spend $1,700-$3,500 for parts and tuning.
  • Have basic mechanical ability or a trustworthy DSM shop.
  • Plan to keep the car for several years — this is a proven, long-term mod.

If your budget is tighter or you only want a small bump, consider a 14B or small 16G. For those chasing 400+ HP, look at a Garrett GT3076R or bigger, but that requires a built bottom end and more complex fuel system.

Conclusion

Upgrading your 2G Eclipse with the EVO III 16G turbocharger is one of the most cost-effective ways to gain 70 horsepower and transform the driving experience. By breaking down each cost — from the turbo unit to fuel injectors, tuning, and installation — you can plan your project without financial guesswork. Whether you tackle the swap in your garage or trust a professional, the result is a responsive, exciting street car that remains reliable. With a well-budgeted approach and attention to supporting mods, this upgrade will reward you every time you hit the boost.