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IAG 550 2.5L Subaru Short Block for WRX, STI, Legacy GT, Forester XT - 550 BHP

by IAG
SKU IAG-ENG-S550
Original price $3,999.99 - Original price $3,999.99
Original price
$3,999.99
$3,999.99 - $3,999.99
Current price $3,999.99
  Lease to own   Pay as low as   $/week

IAG 550 Short Block Includes:

  • Case Halves -Brand new Subaru OEM case halves 99.5mm stock bore
  • Pistons -IAG-Spec JE 99.5mm Forged Pistons, Ring Set, .180" Chromoly Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pin)
  • Connecting Rods -IAG-Spec H-Beam Rods with ARP2000 rod bolts
  • Rod / Main Bearings -ACL or King Race Bearings
  • Crankshaft -Standard New Subaru Nitride Treated 2017+ STI Crankshaft
  • Case / Main Bolts -Standard FHI Subaru case bolt

Compression Ratio:

  • 9.3:1 on D Cylinder Heads (EJ255) w/ OEM Head Gasket
  • 8.8:1 on B, V, and W EJ257 Heads w/ OEM Head Gasket
  • 9.4:1 on S20 Cylinder Heads without Combustion Mod and with OEM Head Gasket
  • 9.0:1 on D Cylinder Heads (EJ255) w/ .039" JE Proseal Head Gasket
  • 8.5:1 on B, V, and W EJ257 Heads w/ .039" JE Proseal Head Gasket
  • 9.1:1 on S20 Cylinder Heads without Combustion Mod and with .039" JE Proseal Head Gasket