SUBARU · SH27531 ECU

SUBARU LEGACY SH27531 tuning files

SUBARU LEGACY on the SH27531: matched, calibrated and delivered with care. Stock output across the matched variants spans 150–170 HP. Stage 1 and Stage 2 are the safe starting points for this platform. Each file is tied to the precise software on your car and checked before it goes out.

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Available solutions

Applicable work for the SH27531 on this vehicle. The available set firms up once the exact engine and software are known.

Stage 1 Stage 2

Engine variants & ECU software

6 distinct variants for the SUBARU LEGACY on the SH27531 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 2500 170HP
Generation: 2015-
Matched gains engine: 1.6 Turbo 170
Controller brand: DENSO
ECU: SH27531
Stock power: 170 HP
Stage 1 power: 190 HP
Power increase: +20 HP (+12%)
Stock torque: 250 Nm
Stage 1 torque: 300 Nm
Torque increase: +50 Nm (+20%)
SW upgrade: EB4V000C
Calibration: EB4V000C

Variant 2

ECU

Catalog engine: 2500 170HP
Generation: 2015-
Matched gains engine: 1.6 Turbo 170
Controller brand: DENSO
ECU: SH27531
Stock power: 170 HP
Stage 1 power: 190 HP
Power increase: +20 HP (+12%)
Stock torque: 250 Nm
Stage 1 torque: 300 Nm
Torque increase: +50 Nm (+20%)
SW upgrade: EB4V400Q
Calibration: EB4V400Q

Variant 3

ECU

Catalog engine: 2000 150HP
Generation: 2008-
Matched gains engine: 2.0D Boxer 150
Controller brand: DENSO
ECU: SH27531
Stock power: 150 HP
Stage 1 power: 180 HP
Power increase: +30 HP (+20%)
Stock torque: 350 Nm
Stage 1 torque: 400 Nm
Torque increase: +50 Nm (+14%)
SW upgrade: EB4G500H
Calibration: EB4G500H

Variant 4

ECU

Catalog engine: 2000 150HP
Generation: 2008-
Matched gains engine: 2.0D Boxer 150
Controller brand: DENSO
ECU: SH27531
Stock power: 150 HP
Stage 1 power: 180 HP
Power increase: +30 HP (+20%)
Stock torque: 350 Nm
Stage 1 torque: 400 Nm
Torque increase: +50 Nm (+14%)
SW upgrade: EB4G500K
Calibration: EB4G500K

Variant 5

ECU

Catalog engine: 2000 150HP
Generation: 2008-
Matched gains engine: 2.0D Boxer 150
Controller brand: DENSO
ECU: SH27531
Stock power: 150 HP
Stage 1 power: 180 HP
Power increase: +30 HP (+20%)
Stock torque: 350 Nm
Stage 1 torque: 400 Nm
Torque increase: +50 Nm (+14%)
SW upgrade: EB4GA00e
Calibration: EB4GA00e

Variant 6

ECU

Catalog engine: 2000 150HP
Generation: 2008-
Matched gains engine: 2.0D Boxer 150
Controller brand: DENSO
ECU: SH27531
Stock power: 150 HP
Stage 1 power: 180 HP
Power increase: +30 HP (+20%)
Stock torque: 350 Nm
Stage 1 torque: 400 Nm
Torque increase: +50 Nm (+14%)
SW upgrade: EB4GB00e
Calibration: EB4GB00e

Related vehicles

Other vehicles built on the SH27531 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the SUBARU LEGACY on the SH27531?

Stage 1, Stage 2. The exact set depends on the specific engine and software version.

Do you cover the SH27531 ECU software on this model?

Yes — the SUBARU LEGACY on the SH27531 ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.

How is the file delivered?

Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.