SUBARU Cosworth EJ-Series

*Images are representatives, the actual product may be different. 

BILLET CRANKSHAFT

Billet crankshaft is the manufacturing method to fulfill specific application. BW has been developing and manufacturing billet crankshafts over 20 years. From material selections to final products delivery, BW take every step professionally. 

  • state-of -the-art design job for individual application
  • complex in-house heat treatment process, including core harden, stress relief and nitriding
  • precision machining process by advanced technologies
  • Zeiss CMM(Contura G2) for dimension inspection
  • 3M advanced technology abrasive for micro-polishing journals
  • Small batch delivery

– Standard in EN40B
– CF surface treatment process applied, for details, please visit https://bwmotorsport.com/championfinish/

Part#StrokeMain JournalThrust WidthCrank PinWeight
B-BS-035I-7979.00 mm60.000 mm22.00 mm52.000 mm8.0 kg

Cosworth Design

  • Cosworth style counterweight design 
  • High strength design
  • Lightweight – It only weights 8 kg compare to the OEM crankshaft which weights 9.2 kg.
  • Cosworth style snout – dual keyway and extra length to support dry sump pulley

Oil-Gallery Comparison

Applications

EJ205

SUBARU – Impreza WRX 1999-2006

EJ207

SUBARU – Impreza WRX STi 1998-present

EJ255

SUBARU – Impreza WRX 2006-2014

SUBARU – Forester XT 2004-2013

SUBARU – Outback XT 2005-2009

SUBARU – Legacy GT: 2005-2012

SUBARU – Baja Turbo 2004-2006

SAAB 9-2X 2006 only

EJ257

SUBARU – Impreza WRX STi 2004-2021

SUBARU – STI S209 2019

SUBARU – WRX STI 2019–2021

SUBARU – WRX STi 2008-present

SUBARU – Legacy GT/Outback XT 2005-2006

SUBARU – Forester XT 2004-2005