EJ257
2.5L turbocharged flat-four
2004 – 2021 — Subaru
The STI boxer, and the source of the WRX rumble.
The 2.5-litre turbocharged flat-four of the WRX STI. Its unequal-length headers give the boxer its distinctive off-beat rumble. Semi-closed deck construction and a rolled-fillet crank separate it from the standard WRX engine.
DISPLACEMENT2,457 cc (2.5L)
CONFIGURATIONFlat-four
CYLINDERS4
INDUCTIONTurbocharged
VALVETRAINDOHC 16v
FUELPetrol
POWER293–341hp
TORQUE393–464Nm
FAMILYEJ
BUILT BYSubaru
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Photo: Graeme Bray;Cropped and otherwise altered by uploader Mr.choppers, CC BY 3.0, via Wikimedia Commons
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