Subaru Legacy 2.5i 175 hp — Stage 1 file (+15 hp)
hp
Stage 1 file for Subaru Legacy 2.5i 175 hp
Target +0 hp. Custom development for your engine.
Chip tuning for Subaru Legacy 2.5i 175 hp ECU
Subaru Legacy (2009) 2.5i 175 hp — mass-market petrol engine of the passenger segment of the Subaru Corporation (Toyota владеет 20%) group (Япония, 1953). Stage 1 chip tuning raises power from 175 to 190 hp (+15 hp, +9%) and torque from 235 to 250 Nm (+15 Nm). A petrol engine built in 2009 — the era before widespread firmware encryption, OBD flash without complications.
The WRX STI is Subaru's iconic rally model. Subaru is a Japanese carmaker specialising in flat engines and all-wheel drive. Subaru has a technical partnership with Toyota (the BRZ/GR86 is a shared model). On the naturally aspirated Subaru Boxer, Stage 1 delivers a modest gain. The WRX and WRX STI are the flagship of the brand's turbo segment. The EJ series (legacy) and the FA/FB series are Subaru's iconic Boxer engines.
The Subaru community in JDM and rally culture is the largest for the WRX/STI. Mid-range Subaru models use naturally aspirated Boxer engines with a conservative calibration.
Frequently asked questions
How many horsepower does the Subaru Legacy 2.5i 175 hp reach after a remap?
Stage 1 for the Subaru Legacy 2.5i 175 hp adds +15 hp — power increases from 175 to 190 hp (+9%). Torque rises from 235 to 250 Nm (+15 Nm).
What does a Stage 1 remap of the Subaru Legacy 2.5i 175 hp include?
Stage 1 on the Subaru Legacy 2.5i 175 hp is a software ECU calibration with no hardware changes. The key maps (boost/ignition/lambda/torque) are adjusted while factory tolerances are preserved. The gain is +15 hp with no hardware changes.
Is a Stage 1 remap safe for the 2.5i 175 hp?
Stage 1 on the Subaru Legacy 2.5i 175 hp is developed while keeping the factory AFR, knock control and temperature limits. Engine life is preserved provided regular maintenance is carried out.
How does Stage 2 differ from Stage 1 on the Subaru Legacy 2.5i 175 hp?
Stage 2 for the Subaru Legacy 2.5i 175 hp is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.
Does Stage 1 void the warranty on the Subaru Legacy?
Stage 1 on the Subaru Legacy voids the factory warranty on the engine and transmission — this is standard for all manufacturers. CHIPOK provides its own warranty on the quality of the remap.
How quickly is chip tuning of the Subaru Legacy 2.5i 175 hp done?
The full remap cycle for the Subaru Legacy — from reading to writing the final file — takes 30-90 minutes depending on the ECU access method. The file is prepared at CHIPOK in 5-30 minutes.
Can you return to stock after Stage 1 on the Subaru Legacy?
The original Subaru Legacy ECU is always saved before flashing. Rolling back to the factory firmware is done with the same programmer in 25-30 minutes.
How much does Stage 1 cost for the Subaru Legacy 2.5i 175 hp?
The cost of Stage 1 for the Subaru Legacy 2.5i 175 hp is calculated in the calculator on this page — you select the options (DPF off, EGR off, AdBlue off, DTC off, etc.) and the price is capped by the package Max Price. Payment is by credits (1 cr = 1 €), with no subscriptions.