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

SKU: IAG-ENG-SX25

$17,599.99

The CNC Billet Aluminum 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.

Each IAG / Crest CNC Case is machined from 6061-T6 Aerospace Aluminum and features Darton Ductile Iron Sleeves. The block is designed with increased material thickness over the OEM cast aluminum case halves and adds a unique 4-bolt bottom end for additional strength.

The IAG / Crest CNC Stage X Block, (Formally Willall) is a complete short block built on the Crest 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

IAG Stage X Complete Shortblock Includes:

Case - Crest Billet / Sleeved Case Halves
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 - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electro-nickel Plated Tops & Ring area, Ring Set, .250" / .927" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
Connecting Rods - IAG-Spec +2mm Tri-Beam w/ ARP625+ Rod Bolts
Rod/Main Bearings - ACL/King Race Bearings
Crankshaft - IAG Billet Crank by Callies
Case / Main Bolts - ARP Main Bolts

Additional Options Available:

Head Studs - IAG / ARP Spec 14mm head studs, nuts, and washers
Oil Pumps - Subaru JDM 12mm Oil Pump / OEM Subaru 11mm 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).