Description

IAG / Crest Stage X Billet Aluminum EJ25 Subarushort Block Using the same world-leading technology found in Willall's incredible billet GT-R block, the billet EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. The Stage "X" Block is a complete short block built on the Willall billet platform, which also includes pistons, rods, bearings, crank, bore/hone, case bolts, line hone, and final assembly and blueprinting. Stage X Billet EJ25 Case Features: Machined from solid billet 6061-T6 Aerospace grade aluminum Darton Ductile iron sleeves Increased material thickness in all known weak points (around head studs, bottom end location) Unique 4 bolt bottom end strengthening Threads are rolled into the block rather than conventionally cut for much greater strength Full cooling system operation Radiused coolant and oil galleries for improved flow and less foaming/turbulence Fits all factory engine bay ancillaries (i.e. AC/PS/etc.) Multiple Times stiffer and stronger than the stock case Precision machined for a superior surface finish Hard anodized to avoid marking or straining

Specifications

Compatibility

  • 2005-2006 Saab 9-2X Aero
  • 2004-2006 Subaru Baja Turbo
  • 2008 Subaru Forester 2.5 XT
  • 2008 Subaru Forester Sports 2.5 XT
  • 2004 Subaru Forester XT
  • 2006 Subaru Forester XT Limited
  • 2005-2013 Subaru Forester XT Premium
  • 2010-2012 Subaru Forester XT Sports
  • 2011-2013 Subaru Forester XT Touring
  • 2009-2010 Subaru Impreza 2.5 GT
  • 2002 Subaru Impreza WRX
  • 2010 Subaru Impreza WRX GT
  • 2006-2013 Subaru Impreza WRX Limited
  • 2009-2012 Subaru Impreza WRX Premium
  • 2010 Subaru Impreza WRX SE
  • 2004 Subaru Impreza WRX STI
  • 2007-2012 Subaru Impreza WRX STI Limited
  • 2010 Subaru Impreza WRX STI Special Edition
  • 2006-2007 Subaru Impreza WRX TR
  • 2010-2012 Subaru Legacy 2.5GT
  • 2005 Subaru Legacy GT
  • 2005-2009 Subaru Legacy GT Limited
  • 2006-2009 Subaru Legacy GT spec.B
  • 2008 Subaru Outback 2.5 XT
  • 2005-2008 Subaru Outback XT
  • 2005-2009 Subaru Outback XT Limited
  • 2012-2021 Subaru WRX STI

IAG / Crest Stage X Billet Aluminum EJ25 Subarushort Block Using the same world-leading technology found in Willall's incredible billet GT-R block, the billet EJ case seeks to change the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. The Stage "X" Block is a complete short block built on the Willall billet platform, which also includes pistons, rods, bearings, crank, bore/hone, case bolts, line hone, and final assembly and blueprinting. Stage X Billet EJ25 Case Features: Machined from solid billet 6061-T6 Aerospace grade aluminum Darton Ductile iron sleeves Increased material thickness in all known weak points (around head studs, bottom end location) Unique 4 bolt bottom end strengthening Threads are rolled into the block rather than conventionally cut for much greater strength Full cooling system operation Radiused coolant and oil galleries for improved flow and less foaming/turbulence Fits all factory engine bay ancillaries (i.e. AC/PS/etc.) Multiple Times stiffer and stronger than the stock case Precision machined for a superior surface finish Hard anodized to avoid marking or straining

  • 2005-2006 Saab 9-2X Aero
  • 2004-2006 Subaru Baja Turbo
  • 2008 Subaru Forester 2.5 XT
  • 2008 Subaru Forester Sports 2.5 XT
  • 2004 Subaru Forester XT
  • 2006 Subaru Forester XT Limited
  • 2005-2013 Subaru Forester XT Premium
  • 2010-2012 Subaru Forester XT Sports
  • 2011-2013 Subaru Forester XT Touring
  • 2009-2010 Subaru Impreza 2.5 GT
  • 2002 Subaru Impreza WRX
  • 2010 Subaru Impreza WRX GT
  • 2006-2013 Subaru Impreza WRX Limited
  • 2009-2012 Subaru Impreza WRX Premium
  • 2010 Subaru Impreza WRX SE
  • 2004 Subaru Impreza WRX STI
  • 2007-2012 Subaru Impreza WRX STI Limited
  • 2010 Subaru Impreza WRX STI Special Edition
  • 2006-2007 Subaru Impreza WRX TR
  • 2010-2012 Subaru Legacy 2.5GT
  • 2005 Subaru Legacy GT
  • 2005-2009 Subaru Legacy GT Limited
  • 2006-2009 Subaru Legacy GT spec.B
  • 2008 Subaru Outback 2.5 XT
  • 2005-2008 Subaru Outback XT
  • 2005-2009 Subaru Outback XT Limited
  • 2012-2021 Subaru WRX STI

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