Legendary Subaru EJ25, S401, and S402 High-Performance Engines for Sale

If you are a Subaru fan, performance tuner, or automobile expert looking for legendary boxer motors that offer the best balance of performance, reliability, and heritage, then you have come to the right page. We are excited to provide Subaru EJ25, Subaru S401, and Subaru S402 engines for sale for applications that extend from normal daily driving through dominating the racing circuit. Restoring a project vehicle or going above and beyond the call with a factory performance engine, our engines are an investment that can’t be beaten when it comes to value.

1. Short Background of Subaru Engines We Sell

We deal in supplying the best-performing, performance-ready Subaru engines that have made a mark in the market. Here’s a brief overview:

Subaru EJ25 Engine: One of the most superior Subaru engines that is famous for its solid low-end torque and tuning capabilities.
Subaru S401 Engine: Very rare and limited-production monster on the EJ20 platform, developed with co-operation from Subaru Tecnica International (STi).
Subaru S402 Engine: Far less frequently seen, pairing luxury and high performance, for select Legacy production runs.

All engines are for sale and inspected, compression-tested, and ready to install.

2. Subaru EJ25 Engine for Sale: Legacy of Versatility and Performance

What Is the EJ25 Engine?

The Subaru EJ25 engine is a 2.5L boxer (flat-four) engine that debuted in the 1990s and is used in most Subaru models like the Impreza WRX STI, Legacy GT, Outback, and Forester. It is loved by tuners and builders due to its power and reliability.

Key Features:

Displacement: 2.5L (2457cc)
Configuration: Flat-4 (Boxer)
DOHC/Single AVCS (version dependent)
Turbocharged and Naturally Aspirated versions
Stock HP: 165 hp (NA engines) to 310+ hp (WRX STI)

Common Applications:

Subaru WRX and WRX STI (2004-2021)
Subaru Forester XT
Subaru Legacy GT
Subaru Outback

Why Buy From Us?

We sell Subaru EJ25 for sale engines that are:

Fully tested and cleaned
Arriving in long block or full drop-in configuration
Warranty-protected
Sold worldwide with same-day shipping

Whether you are rebuilding a blown engine or building a turbo monster, the EJ25 is the ideal platform.

3. Subaru S401 Engine for Sale: Exotic Japanese Performance

What is the Subaru S401 Engine?

Produced in very low numbers (only 401 units), the S401 is a high-output version of the Legacy B4’s EJ20 engine. It was co-developed with STi and features special internal parts, high-boost turbocharging, and modified engine spec.

Key Specs:

Displacement: 2.0L (1994cc)
Configuration: Turbocharged Flat-4
Horsepower: Around 295 hp
Redline: ~8000 RPM
STi-specific internals and ECU mapping

Exclusive Features:

Balanced crankshaft and pistons
Strengthened connecting rods
Twin-scroll turbo system
STi-tuned suspension and drivetrain in vehicle application

Applications:

Subaru Legacy B4 S401

Why Buy Our S401 Engines?

It’s very difficult to locate an authentic Subaru S401 engine for sale. Our catalog features verified engines from authentic Japanese importers, compression-tested, oil-pressure-tested, and integrity-tested.

These engines would be ideal for restoration, JDM swaps, or for collectors.

4. Subaru S402 Engine for Sale: The Luxury Turbo Boxer

What is the Subaru S402 Engine?

The S402 is the synergy of Subaru’s performance luxury and engineering mastery. Originating from the EJ25 platform, this low-production engine (from Legacy S402) features unique upgrades and STi tuning to provide luxury driving capabilities.

Key Specs:

Displacement: 2.5L
Configuration: Turbocharged Flat-4 (Boxer)
Output: Approx. 285–295 hp
STi-tuned with custom ECU

Important Features:

Billet crankshaft and forged pistons
Tuned turbocharger for improved mid-range response
Improved cooling and lubrication system
Rare engine with collectibility and heritage

Applications:

Subaru S402 Legacy

Buying with Confidence

Our sale-ready Subaru S402 engines include detailed documentation. We inspect each unit to ensure:

Authenticity

Performance specs are preserved
Cleanliness and integrity of the engine

These engines are ideal for the ultimate high-end Legacy build or collector who appreciates Subaru’s finest engineering.

5. Why Buy Your Subaru Engine from Us?

We don’t just sell motors—we provide reliability, service, and experience:

Genuine Used and Rebuilt Units: With OEM parts or better
Fully Tested: Compression, leak-down, oil pressure, and more
Warranty Coverage: On some units for peace of mind
Worldwide Shipping: Fast, safe, and insured shipping
Technical Support: Pre- and after-sale

6. Subaru Engine Swap Options and Performance Upgrades

If you’re doing an engine swap in a GC8 chassis, you’re building a track monster, or you just want a little extra power for your daily ride, these motors are excellent choices.

EJ25: Excellent for turbo swaps, street use
S401: Excellent for high-end JDM use
S402: Excellent for individual seeking performance with luxury

Call and ask regarding ECU matching, wiring harnesses, and bolt-on packages.

7. Purchasing Your Subaru Engine

Buying from us is convenient and safe. Easy:

Call us on our web page or by phone for quantity in stock
Choose your config (long block, full engine, rebuilt, etc.)
Pay securely through us
Have shipped to your door with tracking

Domestic shipping and international to suit your schedule.

8. Conclusion: Trust Us for Your Subaru Engine Needs

Subaru EJ25, S401, and S402 engines for sale guarantee that we’re providing you with more than an engine. We’re providing quality, confidence, and performance. Whether you’re a tuner, collector, shop, or weekend builder, our inventory of Subaru engines is here to power your next build.

Don’t settle for second-best. Call today to inquire about availability, price, and shipping. Your next performance upgrade starts here.

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Subaru Performance Engines

SUBARU EJ25 ENGINE | SUBARU S401 ENGINE | SUBARU S402 ENGINE