FA20 Engine for Sale: The Ultimate Buyer’s Guide

If you’re a Subaru enthusiast or simply a car performance aficionado, the FA20 engine is probably on your radar. Whether you’re replacing a blown engine, upgrading your ride, or building a high-performance project car, searching for an FA20 engine for sale can feel like diving into a sea of technical specs, performance data, and vendor options. This detailed guide will help you navigate the market and make the best decision for your needs.

What Is the FA20 Engine?

The FA20 engine is a 2.0-liter, flat-four (boxer), direct-injection engine developed by Subaru and Toyota. First introduced in 2012 in the Subaru BRZ, Toyota 86, and Scion FR-S, the FA20 represents a technological leap in Subaru’s engine design.

FA20 Engine Key Specifications:

• Displacement: 2.0 liters (1998 cc)

• Configuration: Flat-4 Boxer engine

• Bore x Stroke: 86 mm x 86 mm (square design)

• Compression Ratio: 12.5:1

• Fuel Delivery: Toyota’s D-4S system (direct and port injection)

• Power Output: ~200 hp @ 7000 rpm

• Torque: ~151 lb-ft @ 6400 rpm

• Redline: 7400 rpm

This engine balances performance, efficiency, and low center of gravity—making it ideal for sports cars and track builds.

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Types of FA20 Engines Available for Sale

Before you buy, it’s crucial to understand the two main variants of the FA20 engine:

1. FA20D (Naturally Aspirated)

• Found in: Subaru BRZ, Toyota 86, Scion FR-S

• Power: ~200 hp

• Focus: High-revving performance and throttle response

• Ideal for: Street driving, track day builds, and lightweight sports cars

2. FA20F (Turbocharged)

• Found in: Subaru WRX (2015–2021)

• Power: 268 hp and up

• Features: Twin-scroll turbocharger, intercooler, direct injection

• Ideal for: Turbo builds, power mods, and rally-style performance

When searching for an FA20 engine for sale, ensure you know which version suits your project.

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Why Buy an FA20 Engine?

The FA20 is known for its lightweight design, low center of gravity, and aftermarket support. Here are a few compelling reasons to consider this engine:

1. Balanced Performance

The square bore-to-stroke ratio (86×86 mm) gives the FA20 a naturally balanced character, making it ideal for responsive driving.

2. Tuning Potential

While the naturally aspirated FA20D has modest tuning gains, the turbocharged FA20F is widely modified to produce over 400 hp with proper supporting mods.

3. Lightweight and Compact

The boxer layout keeps the engine low in the chassis, contributing to better handling—especially noticeable in vehicles like the BRZ and WRX.

4. Availability of Used and Rebuilt Units

With millions of FA20-powered vehicles on the road, finding a used, rebuilt, or remanufactured FA20 engine for sale is easier than ever.

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Where to Find FA20 Engines for Sale

Finding a reliable source for your FA20 engine is critical. Here are the best places to shop:

1. Online Marketplaces

• eBay Motors: Offers both new and used FA20 engines. Look for sellers with strong feedback.

• Facebook Marketplace: Great for local deals—often cheaper than retailers.

• Craigslist: Good for bargain finds, but be cautious of engine condition.

2. Performance Shops and Tuners

• Reputable tuners often sell rebuilt or modified FA20 engines.

• Some offer performance packages, including upgraded internals or forged components.

3. Auto Parts Retailers and Importers

• JDM Engine Depot, JDM Engine Zone, and Tiger Japanese specialize in importing low-mileage engines from Japan.

• Subaru Performance Parts dealers sometimes offer crate FA20 engines or short blocks.

4. Salvage Yards and Junkyards

• Pull-out FA20 engines from totaled BRZs or WRXs can be very affordable.

• Check local listings or use platforms like Car-Part.com or LKQ Online.

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What to Look for When Buying an FA20 Engine

Whether buying used, rebuilt, or new, keep the following in mind:

1. Engine Mileage

• Lower mileage is preferable (under 50,000 miles).

• Japanese Domestic Market (JDM) engines often have lower miles due to strict emissions rules in Japan.

2. Compression Test Results

• Always request compression numbers if buying used. Healthy FA20 engines should have even compression across all cylinders (ideally 170–190 psi).

3. Warranty or Guarantee

• Many engine resellers offer a 30-day to 6-month warranty. Reputable vendors will stand behind their engines.

4. Complete Long Block vs Short Block

• Long Block includes head(s), valve cover, and internal parts—ideal for easier swaps.

• Short Block is just the bottom end (block, pistons, crankshaft)—used for engine rebuilds or performance builds.

5. ECU and Wiring Harness Compatibility

• For engine swaps, ensure the FA20 engine comes with a compatible ECU and wiring harness. This is crucial for both BRZ and WRX swaps.

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How Much Does an FA20 Engine Cost?

The price depends on the condition, variant, and location.

Note: Always factor in shipping costs, which can range from $200 to $600.

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Common Issues to Watch Out for

While the FA20 engine is generally reliable, here are some known issues:

1. Valve Spring Recall (FA20D)

In 2018, Subaru recalled many FA20D engines due to faulty valve springs. Confirm if your engine’s VIN was affected.

2. Oil Consumption

Both FA20D and FA20F engines can consume oil if not properly maintained. Always check for oil leaks or smoke from the exhaust.

3. High RPM Wear

Over-revving or tracking the FA20 without proper upgrades can lead to rod bearing failure or piston ring wear.

4. Boost Pressure Control (FA20F)

WRX models using the FA20F may experience boost creep or overboosting if the wastegate fails.

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Modifying the FA20 Engine

Looking to extract more power? Here’s what you need:

For FA20D (NA):

• Cold Air Intake

• Header-Back Exhaust System

• ECU Tune (e.g., Ecutek, OpenFlash)

• Lightweight Pulley Kit

• Cams and Valvetrain Upgrade

Max gains without forced induction: ~220 hp

For FA20F (Turbo):

• Upgraded Turbocharger

• Front-Mount Intercooler

• Fuel Injectors and Pump Upgrade

• Forged Pistons and Rods

• Standalone ECU or Tuner

Max gains with bolt-ons and tune: ~350–400 hp
With internal upgrades: 500+ hp

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Best Cars for an FA20 Engine Swap

If you’re building a sleeper or race car, the FA20 is a great candidate for engine swaps. Top swap vehicles include:

• Subaru GC8 Impreza Coupe

• Toyota AE86

• Mazda Miata (NA/NB)

• Toyota MR2

• Subaru Legacy or Outback

• Kit Cars (Factory Five 818)

Swapping an FA20 offers great balance, modern efficiency, and a unique sound profile.

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Tips for Installing an FA20 Engine

• Always replace the timing chain, gaskets, and water pump if buying used.

• Use factory torque specs and a service manual during installation.

• Reflash or tune the ECU after installation, especially if modifying the intake or exhaust.

• Don’t forget engine break-in procedures if you’re installing a rebuilt or new engine.