Subaru — Stage 1 / Stage 2 parameters database

The CHIPOK database holds 39 engines for Subaru with reverse-engineered ECUs and Stage 1 / Stage 2 target parameters. We cover 9 models — from early generations to current platforms. A predominantly petrol lineup.

Models9
Engines39
ECU makersBosch / Continental / Denso / Siemens
File turnaround30–60 min
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About Subaru chip tuning

Engines and platforms:
  • Main engines: EJ20 (Impreza/WRX legacy), EJ25 (Outback/Forester legacy), EJ257 (STI), FA20DIT/FA20F (newer WRX), FA24F (WRX), FB20 (Outback/Impreza), FB25 (Forester), EE20 boxer diesel 2.0L, EZ30/EZ36 (H6 legacy)
  • Platforms: SGP
Supported ECUs:
  • Manufacturers: Bosch / Continental / Denso / Siemens
  • Specific Subaru units in the database: Hitachi SH7055 (legacy EJ20/25), SH7058 (newer EJ255/257), SH7059 (FA20DIT, FB20/25), Denso SH72543 (newer FA24F), Denso SH72546, Subaru Select Monitor blocks, Subaru Select-2 + Select-3 diag, Hitachi MX-S (newer)
  • Subaru specifics: Denso ECU — on WRX/STI Stage 2 (3" downpipe + intake) is popular, potential up to 350+ hp
Service terms:
  • Calibrations are done by hand in WinOLS5 + Ghidra for each specific control unit
  • Checksums are recalculated on the engineer's side — the file is ready to flash with a current programmer
  • File returned within 30-60 minutes during working hours
  • Free revisions based on an OBD log