IAG Performance / Crest CNC Stage X 2.5L Subaru Billet Aluminum Short Block For WRX, STI, LGT, FXT

$17,999.99

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The IAG Performance / Crest CNC 2.5L Subaru Billet Aluminum Short Block aspires to revolutionize the Subaru performance tuning market by reinventing the EJ and addressing virtually every weakness that exists in max-power builds. The Stage X Billet Short Block is engineered to eliminate case flex in high-power EJ builds, making it possible to reliably run at a power output rating of 1150+BHP. This short block is equipped with radiused coolant and oil galleries to improve flow, a 4-bolt bottom end for added strength, and replaceable iron sleeves, making rebuilds easier. If you are looking for an EJ engine that can deliver high horsepower without any compromises, then the Crest CNC/IAG Stage X billet short block is the perfect choice!

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  • IAG Performance / Crest CNC Stage X 2.5L Billet Aluminum Short Block Includes:

    • Case Halves -Crest Billet / Sleeved Case Halves
    • Pinned Mains -Machine case for 9.5mm pinned mains.
    • Fire-Lock -IAG Fire-Lock™ receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's - *IAG Fire-Lock™ head gaskets required
    • Machining -Machined for 14mm Head Studs *(Studs sold separately / Note the proper head gaskets or head gasket modifications are required for proper fitment with 14mm studs.
    • Pistons -JE 99.5mm FSR 2618 custom forged pistons, JE Pro Seal Ring Set, .250" H13 .927" tool steel wrist pins, Clips
    • Connecting Rods -Custom IAG-Spec +2mm Tri-Beam Forged Connecting Rods with ARP 625+ Rod Bolts.
    • Rod / Main Bearings -ACL Race Bearings
    • Crank -IAG-Spec Billet 79mm Crankshaft
    • Case / Main Bolts -ARP Case Bolts

    Compression Ratio:

    • 9.1:1 on on D Cylinder Heads (EJ255)
    • 8.8:1 on B, V and W EJ257 Heads with IAG Fire-Lock™ head gaskets..

    Additional Options Available:

    • Head Studs -IAG / ARP Spec 14mm head studs, nuts, and washers
    • Oil Pumps -IAG Stage 2 CNC Ported 11mm EJ Oil Pump
    • IAG Oil Pickup -Upgraded oil pickup featuring heavy gauge steel tubing, 2 point bracket & mesh filter
    • IAG Oil Baffle -Upgraded oil control baffle and windage tray
    • IAG Oil Pickup & Baffle Set -Upgraded oil pickup, oil control baffle, and windage tray
    • Hardware / Seal Option -(Includes: Wrist pin plugs, washers, separator cover, bolts, etc. In case you don't want to transfer from the original engine).

    Head Gasket Required:

    • *IAG Fire-Lock .051" Head Gaskets with IAG-Spec Alloy Ring Set* PN# IAG-ENG-1741