2.5i - 175ch Tuning
Subaru Legacy — Detailed power and torque gains by stage.
Gains by stage(4)
Power
175 hp
Torque
235 Nm
essence
Power
175→190ch
+15 ch
+9%
Torque
235→250Nm
+15 Nm
+6%
OriginalTuned
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Everything about 2.5i - 175ch tuning
Tuning the 2.5i - 175ch found in the Subaru Legacy is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.
On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.
Gains summary by stage
On the Subaru Legacy 2.5i - 175ch, tuning delivers up to +35 hp and +45 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 175 → 190 hp | 235 → 250 Nm | — |
| Stage 2 | 175 → 210 hp | 235 → 280 Nm | — |
| E85 Flexfuel | 175 → 175 hp | 235 → 235 Nm | — |
| E85+ | 175 → 190 hp | 235 → 250 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 2.5i - 175ch?
Tuning the 2.5i - 175ch (Subaru Legacy) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 2.5i - 175ch?
Yes, the 2.5i - 175ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a certified tuner with maps tailored to your engine.
How much does Subaru Legacy tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my Subaru Legacy?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.