Remote ECU tune · 2.5L EJ255 turbo flat-4
A custom Stage 1, 2 or 3 calibration for your Subaru WRX 2.5T (EJ255), built by hand by a real tuner from your own stock file and datalog, and back with you within three hours of the file arriving. We tune these cars remotely, worldwide: you read and flash with your own HP Tuners interface, and you pay only once the tune is delivered.
Stock vs tuned
From the factory the Subaru WRX 2.5T (EJ255) makes 265 hp and 244 lb-ft (331 Nm). A Stage 1 tune typically adds 20–36 hp and 24–41 lb-ft, for around 285–301 hp in total. With bolt-ons and a Stage 2 calibration that grows to +35–50 hp, and a Stage 3 build — a hybrid or upgraded turbocharger, with the fuelling to support it — typically lands at 355–415 hp.
| Stage | Added power | Added torque | Total power | Total torque |
|---|---|---|---|---|
| Stock | — | — | 265 hp | 244 lb-ft (331 Nm) |
| Stage 1 | +20–36 hp | +24–41 lb-ft (+33–56 Nm) | 285–301 hp | 268–285 lb-ft (364–387 Nm) |
| Stage 2 | +35–50 hp | +44–66 lb-ft (+60–90 Nm) | 300–315 hp | 288–311 lb-ft (391–421 Nm) |
| Stage 3 | +90–150 hp | +81–140 lb-ft (+110–190 Nm) | 355–415 hp | 325–384 lb-ft (441–521 Nm) |
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Tuner's notes
Stock figure is the 2009-2014 output; A downpipe must be calibrated for, because the factory 2-port boost control overboosts with a freer exhaust.
Supported versions
HP Tuners lists 1 Subaru WRX 2.5T (EJ255) entry covering 2008–2014. Interface: MPVI2 or newer.
| Years | Model / engine as HP Tuners lists it | Controller | Credits | Interface |
|---|---|---|---|---|
| 2008–2014 | WRX | Engine | 4 | MPVI2/2+/3/4 |
Support data per HP Tuners' supported-vehicle list (June 2026). Check your exact car on HP Tuners' vehicle list before you buy credits.
Stages & prices
One flat price per stage, the same for every car: $250 for Stage 1, $450 for Stage 2 and $650 for Stage 3. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order. Gearbox (TCM) shift tuning is included wherever your car's transmission controller can be accessed.
Software only. Every map in the engine ECM is recalibrated for the Subaru WRX 2.5T (EJ255) as it sits today — spark, fuelling, throttle response and limiters — against the datalog you send.
For a Subaru WRX 2.5T (EJ255) with bolt-ons fitted — intake, exhaust, headers or downpipe, and an intercooler where the car has one. The airflow and fuelling are rebuilt around the hardware you actually have.
Stage 3 on the Subaru WRX 2.5T (EJ255) means a hybrid or upgraded turbocharger, with the fuelling to support it. The fuel, spark and boost maps are written from scratch for your exact combination.
Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
Before you order
How it works
FAQ
Typically 20–36 hp and 24–41 lb-ft (33–56 Nm) over the stock 265 hp, for around 285–301 hp in total. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
An HP Tuners interface (we recommend the MPVI4), the HP Tuners credits needed to license the engine ECM for writing, and your stock file plus a datalog of a drive. You read and flash the car yourself; we build the calibration.
Your custom tune is delivered within three hours of your stock file arriving. Six tuners work three shifts, so a file that lands in the middle of the night is picked up just as fast.
Stage 1 is $250, Stage 2 is $450 and Stage 3 is $650, flat. Ordering is free and you pay only once the finished tune is delivered. 2 free revisions are included with every order.
Stage 3 on the Subaru WRX 2.5T (EJ255) means a hybrid or upgraded turbocharger, with the fuelling to support it. The maps are written from scratch for your build, and typical results are 90–150 hp over stock. Typical gains from published dyno results; your car will vary with fuel, mods and conditions.
