Subaru FA20 Engine for Sale

About the Subaru FA20 Engine

The Subaru FA20 engine for sale here is a flat-4 boxer that tugs at the heartstrings of many enthusiasts. It's a compact powerplant, high in versatility and tuning potential. Having been used in popular cars like the Subaru BRZ and Toyota 86 (in NA FA20D form) and the Subaru WRX and Forester XT (in FA20DIT turbocharged form), it offers performance and efficiency in a good mix. Its flat-four design contributes to improved vehicle handling due to the low center of gravity. While the NA variant might not be the most powerful engine in stock form, where it truly excels is at character and revability , it can also be tuned for more power. Its reliability and responsiveness make this motor a favorite of everyone from daily drivers to weekend racers. If you're searching for "brz engine for sale," "scion fr-s engine," "toyota 86 engine," "wrx fa20 engine," or general subaru fa20 , this is the right listing.

The FA-Series Engine Family (Different from EJ-Series)

Important context: the Subaru FA20 is part of the FA-series engine family, which is a completely NEW engine family Subaru developed in joint partnership with Toyota Motor Corporation starting in 2012. The FA-series is separate from and unrelated to the older EJ-series engines (EJ20, EJ25, etc.) that powered Subarus from 1989 to 2021.

Differences between the FA-series and EJ-series:

The FA-series represents a clean-sheet redesign that addresses many of the EJ-series's known service items while introducing new characteristics suited to modern Subaru applications.

FA20 Variant Breakdown

FA20D / 4U-GSE (Naturally Aspirated) , Live Page Stock

The sports car NA variant used in BRZ/86/FR-S:

• Displacement: 2.0L (1,998 cc)
• HP: 200-205 HP at 7,000 RPM
• Torque: 151-156 lb-ft at 6,400-6,600 RPM
• Compression: 12.5:1 (one of the highest production NA compression ratios)
• Aspiration: Naturally aspirated
• Fuel System: Toyota D-4S dual injection , port injection + direct injection
• Redline: 7,400 RPM (high-revving for a boxer)
• Toyota Name: 4U-GSE (same engine, Toyota designation)
• Production: 2012-2021
• Applications: Subaru BRZ (2013-2020), Toyota 86 (2017-2020, was Scion FR-S 2013-2016), GT86 (European market)

The FA20D is famous for its sports car character , high-revving, light, and engaging. The unique D-4S dual injection system uses BOTH port injection (at low loads for smoother operation and to reduce intake valve carbon buildup) and direct injection (at high loads for power and efficiency). This system enables the high 12.5:1 compression ratio.

Common owner observation: the FA20D has a documented torque dip in the 3,000-5,000 RPM range , the engine produces strong torque at low RPM, dips slightly in the mid-range, then comes alive past 5,500 RPM toward redline. Owners often describe the engine as wanting to be revved.

FA20DIT (Turbocharged) , WRX / Forester XT Variant

The turbocharged FA20 variant:

• Displacement: 2.0L (1,998 cc)
• HP: 268 HP at 5,600 RPM
• Torque: 258 lb-ft at 2,000-5,200 RPM , broad torque curve
• Compression: 10.6:1 (lower than NA for boost)
• Aspiration: Turbocharged with IHI VF series turbo and intercooler
• Fuel System: Direct injection only (no port injection on turbo)
• Production: 2014-2021
• Applications: Subaru WRX (2015-2021, replacing the previous EJ255), Subaru Forester XT (2014-2018), Subaru Levorg (JDM 2014-2020)

The FA20DIT in the WRX produces notably more low-end torque than the previous EJ255 it replaced (258 lb-ft from 2,000 RPM vs the EJ255's later peak), making the 2015+ WRX more drivable in everyday conditions. The Forester XT used the same engine for capable family-SUV performance.

FA20F (Limited)

A variant used in certain Forester XT applications with slightly different state of tune. Less common than the FA20DIT.

FA20 Variants Summary

Key Engineering Features

• Flat-4 (Boxer) Configuration: Lower center of gravity, inherent primary balance

Vehicle Compatibility

Direct Fit (FA20D / 4U-GSE NA Variant):

Direct Fit (FA20DIT Turbo Variant):

Condition and Inspection

• Variant verified (FA20D NA / 4U-GSE or FA20DIT turbo)
• Donor vehicle confirmed (BRZ, Toyota 86, Scion FR-S, WRX, or Forester XT)
• All 4 cylinders compression tested
• Oil pressure verified at idle and operating speed
• AVCS variable valve timing function verified (intake AND exhaust camshafts)
• D-4S dual injection system tested (FA20D NA only, port AND direct injection)
• Turbocharger condition verified (FA20DIT, IHI VF series, including shaft play, oil seals)
• Wastegate operation verified (FA20DIT)
• Semi-closed deck block condition assessed
• Cylinder head condition assessed (aluminum heads, no warping)
• Valve spring condition verified (FA20D 2013-2014 recall items)
• Direct injection injectors tested (both variants)
• Port injectors tested (FA20D only)
• High-pressure fuel pump function tested
• Spark plug condition documented (4 iridium plugs)
• Coil-on-plug function verified
• Carbon buildup on intake valves assessed (especially FA20DIT direct injection only)
• Coolant system function verified
• Miles from donor vehicle documented where available
• Variant correctly identified (FA20D NA vs FA20DIT turbo)
• All 4 cylinders compression tested
• AVCS variable valve timing tested (both intake and exhaust)
• D-4S dual injection system tested (FA20D)
• Turbocharger condition verified on FA20DIT
• Valve spring recall verification (FA20D 2013-2014)
• Semi-closed deck block inspection
• Carbon buildup assessment on intake valves
• Donor vehicle and mileage documented
• Cross-reference assistance across BRZ / 86 / FR-S / WRX / Forester XT
• BRZ/86 build consultation
• WRX performance build consultation
• Free freight pallet delivery to all 50 states
• 15 day replacement warranty on internal defects
• Subaru FA20 family specialist support team